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%I #5 Apr 28 2021 00:02:40
%S 1,2,7,22,56,295,2298,20666,194155,2700996,51521837,1239525245,
%T 36497293583,1416042960537,72342354105238,4760390278139941,
%U 400064661916351750
%N Number of planar n X n X n binary triangular grids with no more than 2 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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