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A153958 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 7 ones in any 5 X 5 X 5 subtriangle. 0

%I #3 Mar 31 2012 12:35:21

%S 1,2,2,4,6,8,14,52,78,248,909,2324,7268,47501,121021,658137,4239215,

%T 19354790,106079779,1177208160,5469153552,52045617401,594802267838,

%U 4804258306801,46214470259731,931757866564437,7539129948721736

%N Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 7 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009

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