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A269073
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Number of nX6 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
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1
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41, 489, 7477, 102545, 1383105, 18220241, 236272677, 3024972401, 38333973609, 481701017577, 6010309951205, 74542025956769, 919716929870465, 11296618314880209, 138204770920790229, 1684906034464128193
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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) = 28*a(n-1) -230*a(n-2) +192*a(n-3) +3805*a(n-4) -5776*a(n-5) -27808*a(n-6) +25744*a(n-7) +101333*a(n-8) -13916*a(n-9) -149690*a(n-10) -66848*a(n-11) +23183*a(n-12) +9888*a(n-13) -2304*a(n-14)
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EXAMPLE
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Some solutions for n=4
..1..0..0..0..0..0. .0..0..1..0..0..1. .1..0..0..0..0..1. .0..0..1..0..1..0
..0..0..0..0..1..0. .1..0..0..1..0..0. .0..0..0..0..0..0. .1..0..1..0..0..0
..0..0..1..0..1..0. .1..0..0..0..0..0. .0..0..1..0..0..1. .0..0..0..0..1..0
..1..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..1. .1..0..0..0..0..1
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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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