%I #5 Apr 28 2021 00:04:37
%S 1,2,8,42,176,576,4836,66134,1154324,22094979,473556087,16081015577,
%T 781788953511,50068113839258
%N Number of planar n X n X n binary triangular grids with no more than 3 ones in any 5 X 5 X 5 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 01 2009
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