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A268004
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Number of 1Xn 0..n arrays with every repeated value in every row and column equal to the previous repeated value, and new values introduced in row-major sequential order.
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2
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1, 2, 5, 14, 45, 163, 657, 2910, 14020, 72860, 405610, 2404875, 15111771, 100221229, 698963970, 5110106721, 39055225870, 311266844753, 2581286974308, 22229605651905, 198447018330411, 1833460269345737, 17505367714550240
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=8
..0..1..2..3..0..1..0..0....0..0..1..2..0..0..3..1....0..1..2..1..2..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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