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A153939 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 3 X 3 X 3 subtriangle. 0

%I

%S 1,2,4,15,59,432,3332,48304,732710,20860338,622243455,34837075520,

%T 2043323102439,224967044124824,25947204334949263,5617471553259441802,

%U 1274053481965034919451,542391484462533633238628

%N Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 3 X 3 X 3 subtriangle.

%K nonn,changed

%O 0,2

%A _R. H. Hardin_, Jan 03 2009

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Last modified May 9 18:11 EDT 2021. Contains 343744 sequences. (Running on oeis4.)