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 A316535 #24 Jul 17 2018 11:19:12 %S A316535 1,1,9,930,1629189,32324350352,6632560613086062, %T A316535 14025276099356126574624,305611096281378760240051639364, %U A316535 68617947901923542714137396006469280000,158748001407029479280360099562172057138013219144,3784212561528950376893775523091796640110288722110632534528 %N A316535 Number of domino tilings (or dimer coverings) of a 2n X 2n square not counting reflections and rotations. %C A316535 This is the sequence A004003 after removing rotations and reflections. The corresponding terms of A004003 are: 1, 2, 36, 6728, ... . %D A316535 References cited in A004003. %H A316535 S. D. Lord, <a href="http://stevelord.net/tile8.f">GFortran program computes up to 2n=8</a>. %H A316535 S. D. Lord, <a href="http://stevelord.net/tile10.f">GFortran program computes up to 2n=10</a>. %Y A316535 Cf. A004003. %K A316535 nonn %O A316535 0,3 %A A316535 _Steven Lord_, Jul 06 2018 %E A316535 a(6)-a(11) from _Andrew Howroyd_, Jul 17 2018