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A301794
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Number of 5Xn 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero.
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1
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16, 89, 48, 61, 82, 116, 171, 260, 404, 637, 1014, 1624, 2611, 4208, 6792, 10973, 17738, 28684, 46395, 75052, 121420, 196445, 317838, 514256, 832067, 1346296, 2178336, 3524605, 5702914, 9227492, 14930379, 24157844, 39088196, 63246013, 102334182
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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) = 2*a(n-1) -a(n-3) for n>5
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EXAMPLE
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Some solutions for n=5
..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..0..1..1..0
..1..0..1..0..1. .0..1..0..1..1. .0..1..0..1..0. .1..0..0..1..0
..1..0..1..0..0. .0..1..0..0..1. .1..0..1..0..1. .1..1..0..1..0
..1..0..1..1..0. .0..1..1..0..1. .1..0..1..0..0. .0..1..0..1..0
..1..0..0..1..1. .0..0..1..0..0. .1..0..1..1..0. .0..1..0..1..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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