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%I #4 Sep 16 2012 14:11:42
%S 1,11,5318,22831676,915294166360,348567447145791344
%N Number of 4-colorings of a side-n hexagonal array with colors introduced in row major order
%C Column 3 of A216792
%e Some solutions for n=3
%e ......0.1.2..........0.1.2..........0.1.2..........0.1.2..........0.1.2
%e .....1.3.0.1........1.2.0.3........3.2.3.0........3.2.0.1........3.2.3.0
%e ....3.2.1.2.0......0.3.1.2.1......2.0.1.2.1......2.0.3.2.3......2.1.0.2.1
%e .....0.3.0.3........1.0.3.0........3.2.0.3........1.2.0.1........0.2.1.3
%e ......2.1.2..........3.1.2..........0.3.2..........0.1.3..........1.3.0
%K nonn
%O 1,2
%A _R. H. Hardin_ Sep 16 2012
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