This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A151533 #7 Feb 16 2025 08:33:09 %S A151533 1,2,1,3,2,5,4,9,8,16,16,28,30,51,58,96,112,179,216,334,406,624,776, %T A151533 1178,1472,2216,2796,4163,5260,7833,9964,14755,18756,27762,35400, %U A151533 52148,66450,98028,125168,184069,234768,345636,441332,647994,826564,1215424 %N A151533 Number of 2-sided strip polypons with n cells. %H A151533 Ed Pegg, Jr., <a href="http://demonstrations.wolfram.com/PolyformExplorer/">Illustrations of polyforms</a> %H A151533 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Polypon.html">Polypon</a> %Y A151533 Cf. A057784, A151531, A151532. %K A151533 nonn,hard %O A151533 1,2 %A A151533 _Ed Pegg Jr_, May 13 2009 %E A151533 a(21)-a(46) from _Joseph Myers_, Oct 02 2011