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A224351
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Number of nX6 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing
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1
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28, 784, 13052, 151010, 1421762, 12340932, 107694133, 977742699, 9202126546, 88363107023, 855357421083, 8298639299407, 80568348690372, 782845364074773, 7615402149223961, 74171368176011107, 723133239021563347
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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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FORMULA
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Empirical recurrence of order 98 (see link above)
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EXAMPLE
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Some solutions for n=3
..1..1..1..1..2..2....0..0..0..0..0..0....1..1..1..1..1..2....0..1..1..1..2..2
..1..1..1..1..1..1....0..0..0..1..1..1....0..1..1..2..2..2....1..1..2..2..2..2
..0..0..1..1..1..1....0..1..1..1..2..2....0..0..0..2..2..2....0..0..0..0..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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