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 A047945 #8 Apr 14 2021 22:28:40 %S A047945 1,10,2530,250025500,2500000025005000,2500000000002500005000000, %T A047945 250000000000000000250000000500000000, %U A047945 2500000000000000000000002500000000005000000000000,2500000000000000000000000000000025000000000000005000000000000000 %N A047945 Number of 10-colorings of an n X n grid, up to rotational symmetry. %H A047945 Andrew Howroyd, <a href="/A047945/b047945.txt">Table of n, a(n) for n = 0..25</a> %F A047945 a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 10. %Y A047945 Column k=10 of A343095. %Y A047945 Cf. A047937. %K A047945 nonn %O A047945 0,2 %A A047945 _Rob Pratt_ %E A047945 Terms a(8) and beyond from _Andrew Howroyd_, Apr 14 2021