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Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 15.
0

%I #3 Mar 31 2012 12:35:22

%S 126,1131,9526,8779,13757,78476,63531,47267,239549,59060

%N Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 15.

%K nonn

%O 5,1

%A _R. H. Hardin_ Jan 04 2009