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A289647
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Number of n X 4 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.
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1
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0, 44, 607, 8554, 121162, 1756800, 25760875, 382162921, 5717697619, 86172849366, 1306560879457, 19912006342895, 304785181627320, 4682731916448540, 72178508386597722, 1115665066715856620, 17287052005230219381
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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=4
..1..0..1..1. .1..0..1..0. .0..0..1..1. .1..1..0..1. .1..0..1..1
..0..0..1..1. .1..0..0..1. .0..1..0..0. .0..0..0..1. .0..0..1..0
..0..0..1..0. .0..0..0..1. .0..1..1..0. .0..0..0..0. .0..0..0..1
..1..0..0..0. .0..1..1..0. .1..0..0..0. .0..0..0..1. .1..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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