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A202751
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Number of n X n nonnegative integer arrays with each row and column increasing from zero by 0 or 1.
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1
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1, 2, 8, 62, 924, 26394, 1442764, 150786848, 30114993376, 11489639088218, 8372083277093216, 11649087077771471438, 30947648445392475219812, 156963868041535457457609234, 1519762800266538697863301357568
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OFFSET
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1,2
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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 0 0 0 0 0
0 0 0 1 1 0 0 0 1 1 0 0 0 1 1 0 0 0 0 0
0 0 0 1 1 0 0 1 1 2 0 0 1 1 1 0 0 0 1 1
0 1 1 1 1 0 0 1 2 3 0 1 1 2 2 0 0 1 2 2
0 1 2 2 2 0 1 2 3 4 0 1 2 2 3 0 1 1 2 3
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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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