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A284161
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Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
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1
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6, 42, 461, 5888, 80072, 1142173, 16699997, 247899694, 3717494360, 56178550056, 854108948176, 13048507894281, 200142020916533, 3080098116131143, 47536024103910119, 735432363055523510, 11402172535387288712
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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=4
..0..1..0..1. .0..0..0..0. .0..0..1..0. .0..1..0..0. .0..1..1..1
..0..0..0..1. .1..1..1..1. .1..1..0..1. .0..1..0..0. .0..0..1..0
..1..1..1..0. .1..0..1..0. .1..0..0..1. .1..0..1..1. .1..0..1..0
..1..1..1..0. .1..0..1..0. .0..1..0..1. .1..1..0..1. .0..1..1..1
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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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