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%I #5 Apr 28 2021 00:07:57
%S 1,2,8,57,781,20279,989864,91377864,15933677137,5246093512391,
%T 3262374894683471,3831614279502257675,8499107956072261758908,
%U 35605260751502551680547117,281710507240517708494081629167
%N Number of planar n X n X n binary triangular grids with no more than 4 ones in any similarly oriented 3 X 3 X 3 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 01 2009
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