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A201622
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Number of nX5 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor
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1
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16, 718, 31802, 2111763, 136175057, 8368969235, 464328365996, 23135668030252, 1040850319379231, 42653434489979374, 1606362705401822170, 56058651943376958129, 1826011093775518985924, 55867244848599391254270
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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 n=3
..0..0..2..3..3....0..0..1..1..1....0..1..1..3..3....0..0..1..2..2
..0..2..2..0..3....2..2..0..3..3....0..2..2..0..1....1..1..1..1..1
..3..3..2..0..0....3..3..0..0..0....2..2..2..0..1....1..1..2..2..2
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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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