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A202901
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Number of nX3 0..1 arrays with every one equal to some NW, E or S neighbor
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1
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1, 14, 93, 494, 2801, 16062, 91161, 517646, 2942681, 16724094, 95039817, 540117614, 3069530009, 17444277726, 99136698537, 563399082830, 3201826086713, 18196142535870, 103409617841865, 587682198231086, 3339828270813785
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OFFSET
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1,2
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COMMENTS
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Column 3 of A202906
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 8*a(n-1) -17*a(n-2) +32*a(n-3) -70*a(n-4) +72*a(n-5) -24*a(n-6)
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EXAMPLE
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Some solutions for n=5
..0..0..1....0..0..0....0..0..1....0..1..0....0..0..0....0..1..1....1..0..0
..1..0..1....0..1..1....1..1..1....0..1..1....1..1..0....0..0..1....1..1..0
..1..1..1....1..1..1....1..0..1....0..1..1....1..1..1....1..1..1....1..1..1
..1..1..1....0..1..0....1..1..0....0..1..1....0..1..1....1..1..1....1..1..1
..0..1..0....0..0..1....0..1..1....0..0..1....0..1..1....1..1..1....0..0..0
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CROSSREFS
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Sequence in context: A022609 A060217 A113776 * A224328 A101383 A044265
Adjacent sequences: A202898 A202899 A202900 * A202902 A202903 A202904
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Dec 25 2011
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STATUS
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approved
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