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A188954
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Number of nX3 array permutations with each element moved no more than a city block distance of two
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1
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6, 362, 29172, 1722256, 104735558, 6513224285, 402549615544, 24857280209008, 1535940257170788, 94903086891894000, 5863618342142622360, 362289547465186312038, 22384463811480689586560, 1383047351386729941046442
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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..4..2....0..4..2....0..3..1....0..3..2....0..4..2....0..3..1....0..3..5
..9..8..1....5..8..3....5..7..2....7..5..1....3.10.11....9..2..4....6..2..7
..6..3..7....9..1.11....4.11..8....6.10..8....8..1..5....8.11..6...10..1..4
.11.10..5....7..6.10....6.10..9...11..4..9....7..6..9...10..7..5...11..9..8
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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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