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%I #3 Mar 31 2012 12:35:22
%S 1650,6592,10881,16801,14513,14220,11083,6900,3475,1606,588,460,253,
%T 244,241,240,300,240,240,240,240,300,240,240,240,240,300,240,240,240,
%U 240,300,240,240,240,240,300,240,240,240,240,300,240,240,240,240,300,240,240
%N Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 9.
%C Pattern 240 300 240 240 240 starts at n=20 and continues through at least n=53.
%K nonn
%O 5,1
%A _R. H. Hardin_ Jan 04 2009
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