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%I #3 Mar 31 2012 12:35:21
%S 20,40,40,43,35,33,18,11,11,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
%T 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
%U 10,10,10,10,10,10,10,10,10,10,10,10
%N Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 3 X 3 X 3 subtriangle summing to 5.
%C Value 10 starts at n=12 and continues through at least n=60.
%e Maximal zeros solution for n=12
%e .............0
%e ............0.0
%e ...........1.3.1
%e ..........1.0.0.1
%e .........1.0.2.0.1
%e ........1.1.1.1.1.1
%e .......0.2.0.1.0.2.0
%e ......1.0.1.1.1.1.0.1
%e .....2.1.1.0.2.0.1.1.2
%e ....0.0.1.2.0.0.2.1.0.0
%e ...0.2.1.0.0.3.0.0.1.2.0
%e ..2.1.0.1.2.0.0.2.1.0.1.2
%K nonn
%O 3,1
%A _R. H. Hardin_ Jan 04 2009
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