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%I #5 Apr 28 2021 00:02:18
%S 1,2,8,42,418,7166,196648,9262421,735124501,97462705054,
%T 21772941967902,8177116027167826,5158458258244584078,
%U 5470968994479723869739,9752808741716616515809575
%N Number of planar n X n X n binary triangular grids with no more than 3 ones in any 3 X 3 X 3 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 01 2009
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