Search: id:A047944
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%I A047944
%S A047944 1,9,1665,96870249,463255057977921,179474496923598616041129,
%T A047944 5632099886234793640483695986653185,
%U A047944 14316042242555870306568544190208626253583093449
%N A047944 Number of 9-colorings of an n X n grid, up to rotational symmetry.
%F A047944 a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/
               2))/4, with m = 9
%Y A047944 Cf. A047937-A047945.
%Y A047944 Sequence in context: A117053 A120347 A167774 this_sequence A068182 A114224 
               A024125
%Y A047944 Adjacent sequences: A047941 A047942 A047943 this_sequence A047945 A047946 
               A047947
%K A047944 nonn
%O A047944 0,2
%A A047944 Robert W. Pratt (Rob.Pratt(AT)sas.com)

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