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%I #5 Apr 28 2021 00:18:26
%S 1,2,2,3,8,13,39,225,564,2858,24012,101231,758165,10608857,69903886,
%T 854166606,19155776749,207379552763,4126912621572
%N Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 4 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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