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A272969
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Number of nX4 0..1 arrays with exactly n+4-2 having value 1 and no three 1s forming an isosceles triangle.
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0
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4, 21, 4, 8, 4, 37, 8, 44, 8, 44, 0, 34, 4, 44, 0, 48, 0, 52
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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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All solutions for n=3
..1..1..1..0. .1..0..0..0. .0..1..1..1. .0..0..0..1
..0..0..0..1. .1..0..0..0. .1..0..0..0. .0..0..0..1
..0..0..0..1. .0..1..1..1. .1..0..0..0. .1..1..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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