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 A151537 #14 Feb 16 2025 08:33:09 %S A151537 1,2,7,25,99,416,1854,8411,38980,182829,867096,4145168,19955321, %T A151537 96619260,470157772 %N A151537 Number of 1-sided polyedges with n edges. %H A151537 Ishino Keiichiro, <a href="https://puzzlewillbeplayed.com/Polyedges/">Polyedge</a>, Puzzle will be played, 2009. %H A151537 Ed Pegg, Jr., <a href="http://demonstrations.wolfram.com/PolyformExplorer/">Illustrations of polyforms</a> %H A151537 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Polyedge.html">Polyedge</a> %Y A151537 Cf. A019988, A096267, A037245, A151538, A333249. %K A151537 nonn,hard,more %O A151537 1,2 %A A151537 _Ed Pegg Jr_, May 13 2009 %E A151537 a(11)-a(14) from _Joseph Myers_, Oct 03 2011 %E A151537 a(15) from Ishino Keiichiro's website added by _Andrey Zabolotskiy_, Dec 10 2023