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A297336
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Number of nX6 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 0 or 2 neighboring 1s.
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1
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21, 333, 4888, 73147, 1091456, 16277492, 242728633, 3619361855, 53967869192, 804703360025, 11998734637184, 178910069329084, 2667681781924513, 39777110424677008, 593106152583574704, 8843651586637481947
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 24*a(n-1) -154*a(n-2) +246*a(n-3) +521*a(n-4) -1157*a(n-5) -1119*a(n-6) +1776*a(n-7) +1209*a(n-8) -621*a(n-9) -454*a(n-10) -25*a(n-11) +10*a(n-12) +a(n-13) for n>14
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EXAMPLE
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Some solutions for n=5
..0..0..1..0..0..0. .0..0..0..1..0..0. .0..0..0..1..0..0. .0..0..0..1..0..0
..0..0..1..0..0..1. .1..0..0..1..0..0. .0..1..0..0..0..0. .1..0..0..0..0..0
..0..0..0..0..0..1. .0..0..0..1..1..0. .0..1..0..1..0..1. .0..0..0..0..1..0
..0..0..1..0..0..0. .0..0..1..1..0..0. .0..0..0..1..0..0. .0..0..1..0..0..1
..0..0..0..0..0..1. .0..0..0..0..0..0. .0..0..0..1..0..1. .0..0..0..1..0..0
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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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