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Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 15
1

%I #3 Mar 31 2012 12:35:35

%S 1,16,6,27,977,6434,146337,20390870,470828929,56179164262

%N Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 15

%K nonn

%O 0,2

%A _R. H. Hardin_ Oct 09 2009