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A326161
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Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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5, 11, 25, 85, 261, 838, 2644, 8646, 28076, 91588, 300287, 985329, 3236906, 10639958, 34985229, 115030534, 378227748, 1243694242, 4089598628, 13448040812, 44222592709, 145423018099, 478214308106, 1572578892311, 5171330324530
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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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EXAMPLE
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Some solutions for n=5
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..1. .0..0..0..1
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0. .1..0..0..0
..0..0..0..0. .1..0..1..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
..1..0..0..1. .1..1..0..0. .1..0..0..0. .1..0..0..0. .0..0..0..0
..0..0..0..0. .1..0..1..0. .1..1..0..0. .0..0..0..0. .0..0..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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