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Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 11 ones in any 5 X 5 X 5 subtriangle.
0

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

%S 1,2,2,4,16,26,114,913,3227,25373,441919,3146641,49361868,1683721022,

%T 23850420259,734273471828,49324500595954,1380740815171041

%N Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 11 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 04 2009