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A153969
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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.
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0
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1, 2, 4, 16, 63, 396, 2827, 37617, 513564, 13162553, 341036622, 16622509689, 823228295943, 76578732281797, 7241902334442198, 1280682968270209748
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OFFSET
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0,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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