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A153969 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 9 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 4, 16, 63, 396, 2827, 37617, 513564, 13162553, 341036622, 16622509689, 823228295943, 76578732281797, 7241902334442198, 1280682968270209748 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
CROSSREFS
Sequence in context: A153960 A339648 A005027 * A153966 A138867 A138868
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2009
STATUS
approved

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Last modified June 16 23:34 EDT 2024. Contains 373432 sequences. (Running on oeis4.)