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 A047941 #9 Apr 14 2021 22:28:03 %S A047941 1,6,336,2521476,705277897416,7107572010747738816, %T A047941 2578606199622659276537193216,33678386561031835867238388699701784576, %U A047941 15835071665743319426540573726368249140484891508736,268034865369025581797148715934176748584236925114472848300179456 %N A047941 Number of 6-colorings of an n X n grid, up to rotational symmetry. %H A047941 Andrew Howroyd, <a href="/A047941/b047941.txt">Table of n, a(n) for n = 0..25</a> %F A047941 a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 6. %Y A047941 Column k=6 of A343095. %Y A047941 Cf. A047937. %K A047941 nonn %O A047941 0,2 %A A047941 _Rob Pratt_ %E A047941 Terms a(9) and beyond from _Andrew Howroyd_, Apr 14 2021