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A301666
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Number of nX5 0..1 arrays with every element equal to 1, 2 or 4 horizontally or vertically adjacent elements, with upper left element zero.
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1
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3, 61, 407, 2793, 21224, 146841, 1073621, 7703565, 55506215, 399555430, 2875870497, 20706418377, 149059329261, 1073124611823, 7725565402834, 55617663607353, 400401309675815, 2882556650714509, 20752023117855145
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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..1..1..0..1. .0..0..0..1..1. .0..0..1..1..0. .0..0..1..1..1
..0..0..1..0..1. .0..1..1..1..1. .1..1..1..0..0. .1..1..0..0..0
..1..0..1..0..0. .0..1..0..1..0. .0..0..0..1..1. .1..0..0..1..0
..1..0..0..1..1. .0..1..0..1..0. .0..1..1..1..0. .1..0..1..1..0
..1..1..0..1..1. .0..0..0..1..1. .0..1..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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