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A278650
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Number of nX2 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.
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1
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0, 0, 24, 1076, 19893, 235446, 2080575, 14836233, 89504692, 471646066, 2221297222, 9512455863, 37536099773, 137924875200, 475940969064, 1553081484256, 4820235461752, 14298088612192, 40701436072216, 111582345485761
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listen;
history;
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internal format)
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OFFSET
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1,3
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COMMENTS
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LINKS
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FORMULA
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Empirical polynomial of degree 33 (see link above)
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EXAMPLE
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Some solutions for n=4
..1..1. .0..0. .0..2. .1..1. .2..2. .2..2. .1..2. .1..2. .2..2. .0..2
..0..2. .1..2. .0..1. .0..2. .1..1. .2..0. .0..2. .0..2. .2..0. .2..2
..1..2. .1..0. .2..1. .1..2. .0..1. .1..1. .0..0. .2..1. .1..0. .1..2
..1..1. .0..1. .2..0. .0..0. .1..1. .0..1. .0..0. .2..0. .0..1. .0..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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