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A153941 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 4 X 4 X 4 subtriangle. 0

%I

%S 1,2,2,3,8,18,64,323,1239,7677,70851,462347,4699837,77982415,

%T 865056340,15519583779,437728798867,8808271045842,278977031301418

%N Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 4 X 4 X 4 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009

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Last modified June 21 00:55 EDT 2021. Contains 345329 sequences. (Running on oeis4.)