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 A373637 #6 Jun 14 2024 12:16:06 %S A373637 0,0,0,0,1,0,0,3,0,1,8,0,6,24,1,22 %N A373637 Number of free n-celled polyiamonds to which two inequivalent cells can be adjoined such that the two resulting free (n+1)-celled polyiamonds are identical. %C A373637 Two cells that can be adjoined to an n-celled polyiamond are equivalent if there is an isomorphism between the two resulting (n+1)-celled polyiamonds that maps the adjoined cell of the first to the adjoined cell of the second. %H A373637 Pontus von Brömssen, <a href="/A373637/a373637.svg">Illustration up to n = 13</a>. %H A373637 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %Y A373637 Cf. A369366, A373635, A373636. %K A373637 nonn,more %O A373637 1,8 %A A373637 _Pontus von Brömssen_, Jun 13 2024