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A289645
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Number of n X 2 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, 2, 11, 44, 170, 642, 2421, 9142, 34572, 131086, 498465, 1900928, 7269978, 27879108, 107183763, 413052074, 1595247760, 6173412924, 23934713193, 92955294982, 361580812792, 1408539219596, 5494347736318, 21458645441596
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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
..0..1. .0..1. .0..0. .1..0. .0..0. .0..0. .0..1. .1..0. .0..1. .0..1
..0..1. .0..1. .1..0. .1..0. .1..1. .1..0. .0..1. .0..0. .1..0. .1..0
..0..0. .0..0. .1..0. .0..1. .0..0. .0..1. .0..1. .1..0. .0..0. .0..1
..0..0. .0..1. .0..1. .0..0. .1..0. .1..0. .0..0. .0..1. .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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