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 A047943 #9 Apr 14 2021 22:28:21 %S A047943 1,8,1044,33562880,70368748374016,9444732965876730429440, %T A047943 81129638414606686199388699623424, %U A047943 44601490397061246283080881278262737180295168,1569275433846670190958947355821723644654155086251882971136 %N A047943 Number of 8-colorings of an n X n grid, up to rotational symmetry. %H A047943 Andrew Howroyd, <a href="/A047943/b047943.txt">Table of n, a(n) for n = 0..25</a> %F A047943 a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 8. %Y A047943 Column k=8 of A343095. %Y A047943 Cf. A047937. %K A047943 nonn %O A047943 0,2 %A A047943 _Rob Pratt_ %E A047943 Terms a(8) and beyond from _Andrew Howroyd_, Apr 14 2021