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A153936
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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 4 ones in any 5 X 5 X 5 subtriangle.
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0
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1, 2, 4, 13, 26, 65, 226, 1291, 7132, 55130, 379228, 4264780, 44700351, 743555327, 11220972023, 261784540652, 5859844173065, 202299825940682, 6575351187836482
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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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