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A003500 - OEIS
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <html> <head> <link rel="stylesheet" href="/styles.css"> <meta name="format-detection" content="telephone=no"> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta name=viewport content="width=device-width, initial-scale=1"> <meta name="keywords" content="OEIS,integer sequences,Sloane" /> <title>A003500 - OEIS</title> <link rel="search" type="application/opensearchdescription+xml" title="OEIS" href="/oeis.xml"> <script> var myURL = "\/A003500\/list" function redir() { var host = document.location.hostname; if(host != "oeis.org" && host != "127.0.0.1" && !/^([0-9.]+)$/.test(host) && host != "localhost" && host != "localhost.localdomain") { document.location = "https"+":"+"//"+"oeis"+".org/" + myURL; } } function sf() { if(document.location.pathname == "/" && document.f) document.f.q.focus(); } </script> </head> <body bgcolor=#ffffff onload="redir();sf()"> <div class=loginbar> <div class=login> <a href="/login?redirect=%2fA003500%2flist">login</a> </div> </div> <div class=center><div class=top> <center> <div class=donors> The OEIS is supported by <a href="http://oeisf.org/#DONATE">the many generous donors to the OEIS Foundation</a>. </div> <div class=banner> <a href="/"><img class=banner border="0" width="600" src="/banner2021.jpg" alt="A003500 - OEIS"></a> </div> </center> </div></div> <div class=center><div class=pagebody> <div class=searchbarcenter> <form name=f action="/search" method="GET"> <div class=searchbargreet> <div class=searchbar> <div class=searchq> <input class=searchbox maxLength=1024 name=q value="" title="Search Query"> </div> <div class=searchsubmit> <input type=submit value="Search" name=go> </div> <div class=hints> <span class=hints><a href="/hints.html">Hints</a></span> </div> </div> <div class=searchgreet> (Greetings from <a href="/welcome">The On-Line Encyclopedia of Integer Sequences</a>!) </div> </div> </form> </div> <center> <h2><a href="/A003500">A003500</a> as a simple table</h2> <table class=seqlist> <tr><th class=index>n<th class=value>a(n)</tr> <tr><td class=index>0<td class=value>2</tr> <tr><td class=index>1<td class=value>4</tr> <tr><td class=index>2<td class=value>14</tr> <tr><td class=index>3<td class=value>52</tr> <tr><td class=index>4<td class=value>194</tr> <tr><td class=index>5<td class=value>724</tr> <tr><td class=index>6<td class=value>2702</tr> <tr><td class=index>7<td class=value>10084</tr> <tr><td class=index>8<td class=value>37634</tr> <tr><td class=index>9<td class=value>140452</tr> <tr><td class=index>10<td class=value>524174</tr> <tr><td class=index>11<td class=value>1956244</tr> <tr><td class=index>12<td class=value>7300802</tr> <tr><td class=index>13<td class=value>27246964</tr> <tr><td class=index>14<td class=value>101687054</tr> <tr><td class=index>15<td class=value>379501252</tr> <tr><td class=index>16<td class=value>1416317954</tr> <tr><td class=index>17<td class=value>5285770564</tr> <tr><td class=index>18<td class=value>19726764302</tr> <tr><td class=index>19<td class=value>73621286644</tr> <tr><td class=index>20<td class=value>274758382274</tr> <tr><td class=index>21<td class=value>1025412242452</tr> <tr><td class=index>22<td class=value>3826890587534</tr> <tr><td class=index>23<td class=value>14282150107684</tr> <tr><td class=index>24<td class=value>53301709843202</tr> <tr><td class=index>25<td class=value>198924689265124</tr> </table> <p> <table class=seqdata><tr><td> <pre>[2,4,14,52,194,724,2702,10084,37634,140452,524174, 1956244,7300802,27246964,101687054,379501252, 1416317954,5285770564,19726764302,73621286644, 274758382274,1025412242452,3826890587534, 14282150107684,53301709843202,198924689265124]</pre> </table> </center> </div></div> <p> <div class=footerpad></div> <div class=footer> <center> <div class=bottom> <div class=linksbar> <a href="/">Lookup</a> <a href="/wiki/Welcome"><font color="red">Welcome</font></a> <a href="/wiki/Main_Page"><font color="red">Wiki</font></a> <a href="/wiki/Special:RequestAccount">Register</a> <a href="/play.html">Music</a> <a href="/plot2.html">Plot 2</a> <a href="/demo1.html">Demos</a> <a href="/wiki/Index_to_OEIS">Index</a> <a href="/webcam">WebCam</a> <a href="/Submit.html">Contribute</a> <a href="/eishelp2.html">Format</a> <a href="/wiki/Style_Sheet">Style Sheet</a> <a href="/transforms.html">Transforms</a> <a href="/ol.html">Superseeker</a> <a href="/recent">Recents</a> </div> <div class=linksbar> <a href="/community.html">The OEIS Community</a> </div> <div class=linksbar> Maintained by <a href="http://oeisf.org">The OEIS Foundation Inc.</a> </div> <div class=dbinfo>Last modified February 16 10:27 EST 2025. Contains 380915 sequences.</div> <div class=legal> <a href="/wiki/Legal_Documents">License Agreements, Terms of Use, Privacy Policy</a> </div> </div> </center> </div> </body> </html>