A216790 - OEIS

%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