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A188960
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Number of nX3 array permutations with each element moved by a city block distance of no more than three
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1
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6, 720, 229080, 75764664, 17316382188, 3909049448304, 924052205725920, 222219070309228084, 53009406781203828708, 12600147078274878009900, 2996409860247302687479312, 713212717944705067662180768
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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..5..1....0..5..1....0..5..1....0..5..1....0..5..1....0..5..1....0..5..1
..2.10..3....2..9..4....6..2..4....7..9..8....2..9..6....8..7..3....8..3..7
..4..8.11....3..8.11....9..7..3....3..2.11....7..3.11....6..4..9...10..2.11
..9..7..6....7.10..6...10..8.11....6..4.10....8..4.10...11.10..2....4..6..9
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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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