%I #5 Apr 28 2021 00:02:46
%S 1,2,8,42,176,1656,25535,536768,14123143,595925622,38030336629,
%T 3481512865400,454136719811653,87600895347244742
%N Number of planar n X n X n binary triangular grids with no more than 3 ones in any 4 X 4 X 4 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 01 2009
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