%I #6 Apr 28 2021 00:08:56
%S 1,2,8,42,176,1746,27983,630889,18492283,877780369,63669637114,
%T 6801320086494,1063331866929514,250365248652172910
%N Number of planar n X n X n binary triangular grids with no more than 3 ones in any similarly oriented 4 X 4 X 4 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 01 2009
|