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A220736
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Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal, diagonal and antidiagonal neighbors, without consecutive collinear links
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1
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1, 85, 2276, 78418, 2792479, 94226589, 3287610473, 113721332657, 3938053379575, 136391275221050, 4722786906754895, 163558767077415021, 5664109467155941888, 196151416904655312336, 6792842076330880392087, 235240039699005021696465
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3 0=self 1=nw 3=ne 4=w 6=e 7=sw 9=se (reciprocal directions total 10)
.00.00.79.00.69.47...00.67.47.79.00.00...00.00.00.00.69.47...00.79.67.49.69.47
.00.36.47.17.39.17...39.39.39.69.14.00...00.00.00.69.34.17...36.34.17.79.13.17
.00.36.34.00.36.14...00.16.14.16.14.00...00.00.00.00.13.00...00.36.34.00.13.00
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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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