%I #9 Apr 14 2021 22:27:57
%S 1,5,165,489125,38147070625,74505806274453125,
%T 3637978807092666626953125,4440892098500626236200333251953125,
%U 135525271560688054250937420874834136962890625,103397576569128459358926086520114040467888355255126953125
%N Number of 5-colorings of an n X n grid, up to rotational symmetry.
%H Andrew Howroyd, <a href="/A047940/b047940.txt">Table of n, a(n) for n = 0..25</a>
%F a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 5.
%Y Column k=5 of A343095.
%Y Cf. A054752, A047937.
%K nonn
%O 0,2
%A _Rob Pratt_
%E Terms a(9) and beyond from _Andrew Howroyd_, Apr 14 2021