CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "oeis.org",cType: 'managed',cRay: '92d3b890befa4aad',cH: 'AVOnK8r_L6k2aYhJ_DZzR879KBlUn3iIEU5ClTWXk_M-1744135820-1.2.1.1-uu9XdyhK4AfiD5AE_uwx3UCTlvaqtveP9iFbKSHxnXevyHmVCh6f1_H6h9eGfv2i',cUPMDTk: "\/?language=gujarati&__cf_chl_tk=dR9EZ5yAUf7cGtvx1zYcRl7HBW_27uX1hQo0XVxoNSs-1744135820-1.0.1.1-IoerW910BkjPvCro9jAv4Z5t2QTeRRhi4e7zaJTxHmE",cFPWv: 'g',cITimeS: '1744135820',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported_browser_beacon",fa: "\/?language=gujarati&__cf_chl_f_tk=dR9EZ5yAUf7cGtvx1zYcRl7HBW_27uX1hQo0XVxoNSs-1744135820-1.0.1.1-IoerW910BkjPvCro9jAv4Z5t2QTeRRhi4e7zaJTxHmE",md: "NLSMM.lQspstjVZbwqpLwEUzJSFQLL_yxa0fJ5d9jlY-1744135820-1.2.1.1-nNZYWRfvZx03Ln8utfrvi6agymHBcoPKd0C9_0y5cKr9oOb_1Tj3bRiaukWzGCzkHv1y_KQmUwoq49OQbtdFi1IWkj9ChdYLchqmB7yq4YYKOIxFExtwpMP.ewR7xXSvYjjoQI7jO1kOcYJUG70FPe5RS1usVtAyeWff679jiY7IqXw.8.rcv_E7x.17n7QCl3Lic36PQiCEq4dSG1b6RkFkTTzoQKHhYjv_S9xkWwpbtXxHylQMAQMyqdJ6fuN5kuMDbHnwb1Gmet.Qm_ECaWZiZy8uopLss2oLuyMDlJGOSPCr2i9TludD.jWQx2cU36pauS6VhuENWf.lm1Q3Wlilnjc3FI.69LfdYR2hdyB7PqG6VXli1lbmXrgV8G6BsEQBLw5i7Sa4i0AUeDJAQCdJ7ILqZSBSe_ytzM_ddcP2GPDNDCHhLv8opF3NYBOY6CnI77aGB4vcQ49Q1MwYuHKuS78c3lFxjlmCZvDp8P99d30mKXB3499vt_Px.Hll4hBf4FMqIaByKfEH7wxvMzt7AgbZk3N1H4aITXgvcXbWyyO22yGIB8FGEwnwjvwm8NoPXT4VqwUM9JypG_1jz2ubswxfsezmeaMtAg34zjEHaKczCITG29mc8mBN1n2RGUHeB8y1lZEtnMjGfZqSPBlpoYTvedgXsNtIKsSxEMPZT4KVeN65GxgqgbtbWG3bDClF.BAwjSpAhYWWbKg6hyEysPBOxh560CenrzSyhRvWmU60LPwO9OZxN2PUMmsZEtEFxVgzC4jC_peeLsTHrRPyoONX0yFDG9ujuyYroyE5gd7CwtbeZmmEvQaDwRHdX66rlHeFRwf8GdFQauFlOwyoE33BFKTib_wfxT7bQvUGkhbfPI2wKk_QD1h_nuERu9Myl.dmLAM5w8lCvvsJuxe5yW5iyKEWaot5mHhRlLO.diSNnu2V3iE.ROWyXDoHPLOQjw88pU46a72ORdGgnsHV2UGixTq9KGMexSnPVhGZFdI0c67aQ3P54FEIJsldM8b3RYyun76Ux0zZ_B2yk7QCCEo0LBirovJ8CXjFmHzQlYaOTAAtlOIEYH7RbWpcVZNPudQOfDEAbYBE3XRUarvimQCYXGpD.KtSv26P02s",mdrd: "hC7T4ym3qMGtzJ7Pn_QO1G9sz5rz.EoUkKHbtaQaLGc-1744135820-1.2.1.1-w_6_zV_FrWSbWFmHm8v1GHMvhMWrzKwX3oAUx4jc6NOleyiB942Ms.araXS_VoBeWltv6LpJjxMkT19XcFVOYUYCIBfFBp8sSVu99PvrZku6frQjys_Af0AKWVfQPps4OhqjSuCNKU8vKvVE5rYHcSxWzgpREW0UsQKQ_UjM4YJrllu_UFGlNiwa0IpJiSUOKIfgznU7VFTH2lUa..q_9EA39d2_NdR2JamwsBCZw81RYrI14m.n6h25yZDa.0Eeb8RrQg966IC1mlMOK7RPN3hUNlFQ40KctM4ShCril_cjrBXGD7FJVm7BjH9kB1kBGwTwL9Iaxqi4e_IJJqJsL3usz5l3rgFxUU1qKBEbsJfabRxQFMNknJ0IupELSBT4D7fSUGWLfNAnaJ6Ww1GOqk8xHkOrZ8kTuGw6UklMLzD4cy7ElJxqiiyQ18JqKocBINivtEf2alci8QS3PQn7QhzpdhFqrFaJniJ3JgoQtbFZLz.MA9cw7C2gKvLQMVf3E0HEHIvuHQzTKvnNgca7sm_FkjhgLvsRFoHmwSg4g08G0zy1h5MuOaPdPRiEXLadliyPCU.OXMCv6iCES_KYHDYWKlaSA8fNIALf5AgeEd0sJilz04xEQ9U2BDdE7nAVzqJK7XzzD8al7ipVPevCXwTbUQ47eONxVSVp3wqzYZBOajyPXbP9zLJCJjbR_FobJvXr8K1YvwLzbQ83flXR2nSgfmi_gYwR3Wyzx54uhEb8ydvzVhIq9_o2GnX_vxb9ZzQkQC8aWU5aOagVGWpnb9npPFrA.ycsf7tESqHdjMtfY7TXUgTf.j4J1_bHiH2Vt.WIOcKM7EFx1xM9UfucPL93I9IiUUfi39mul.AG.Ju5VSuFZ8BpjTYwUujewx8_VCoQTkS_6SHLTyxaONl45VN5FDYJfPzPjl5jl9MvlUuuIRu73JG53UlQsn1eKbnPDN8aEiP1YFzzc9Gpzn8A7E4zuFZhzvMXoy4.AQlm7UHFuvCMl0r9FCoU7xC7RgLdWo5uYsoOMy6itqWCyVMfx1ttO_xUEfIScLTgOm2wm6btczLY55ReCDeEzTVoNVfXCXnmgcG7R.1f5nrY5CZ2_q9VukjN4uCbkweCFD6LH7adgkmwQ3l_o0HyHBmAiWRPxZ7lmHg_XiBYEivzvztb6AdaGTsKv4cRdTIRV3oZ4iZ6SQk7T3MZUtgRCITZDlPgqUQkpD6cZL9MiIWskLOs4ub__NviL0kG1p0d4tfQxiP99sjhQHARYNcowuivzuhObs4nMfSg0DCiukulAXSpMsl6vVYty6DRPAOR3GbWuPOhJEP.1.wmsvtW_wnIKdlV0AlSU4Slcib2ZD6wMYHOY5O4SMuWzWnFcLrjG.9Kl_ofVaJ_hmqTgfHVvK1g36SZb3ZhSinhA9t9vP_9.XCewAvmySekCCuF0rsuJ4eWkTVr6DG2kbOY.Zj2xXxVGDRVfEfeoqFN2U0WgF1Ybvdl3JnEIpHu4dj0JFxBhndD6wXuIgUzmtmbDFNBgQHBASmE04bARYYq8nJiUSPoNp93Af_dYanCUhgxy9L9CsxJQBtyV4fQA1lEtwC3DQC27ebYHdWggBxeCTEBQ995as59kWfEs2BeoDWqbCv23OFxH48hQfc6E7VIahWj6daQX_3cf.CzyPijcLooGUDDHIz4D_RdSE_UoqBT9zDqnz8RUCwskJxfZ0E9Y6bmNDFtgg6bKPFNB8os9lB1sh..WGB8hDxaAudMTw4zjGtzvSSYETYrsYr424i2_MQ84wR0GegxNpIYEW1IukYkSg32QzxvbYV7u5GyZ7cEPuXhyBpuQGfDbpq0sJv6eUi4gwKS8fWtlTftqflHMALDNeldLs_ZE3IDuqHTFeqZlZgf59GN.wVBHevoetJPaWwJ5aptSugRfh4V8._F69sUshs2W2vj1nO7tomC8G6nRIIMB3CHnjYSDovAu36Jzs1aB9qLTYBec.rd0fA5kmiEhbYwjK3Ry6.nYcigCII.ufImA60XdKJR8fW4qcjMnDLHnNjYxE4B"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=92d3b890befa4aad';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/?language=gujarati&__cf_chl_rt_tk=dR9EZ5yAUf7cGtvx1zYcRl7HBW_27uX1hQo0XVxoNSs-1744135820-1.0.1.1-IoerW910BkjPvCro9jAv4Z5t2QTeRRhi4e7zaJTxHmE" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>