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A186626
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Number of (n+2)X3 0..3 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
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1
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262144, 9576448, 349839616, 12780078472, 351107784608, 9646003088512, 265005162695168, 6097375527142592, 140291562401607848, 3227900658811424387, 65768960528937396632, 1340052444690066421952, 27303769743019178665472
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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 4X3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..1..0....2..2..3....0..3..3....2..2..1....0..0..3....0..0..0....0..1..0
..3..2..1....1..1..0....0..2..1....1..0..2....0..2..1....1..0..1....3..2..1
..3..3..1....2..3..2....3..1..3....2..0..2....1..2..0....2..2..0....1..3..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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