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%I #5 Apr 28 2021 00:18:52
%S 1,2,4,13,26,65,226,1291,7132,55130,379228,4264780,44700351,743555327,
%T 11220972023,261784540652,5859844173065,202299825940682,
%U 6575351187836482
%N Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 4 ones in any 5 X 5 X 5 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 03 2009
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