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A188977
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Number of nX3 array permutations with each element moved but moved no more than a city block distance of two
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1
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2, 116, 7264, 295264, 12838276, 577290185, 25631148992, 1136766429824, 50487034527632, 2241979819401172, 99549503635633660, 4420377191555167852, 196282145900912402736, 8715672825193463217812, 387009187279257877916264
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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
..1..3..0....1..7..0....2..0..5....2..0..1....1..3..8....1..3..8....1..2..5
..7..2.11....9..8.11....4..1.11....9..5..4....0..2..4....9..0..7....0..6.11
..4..9.10....3..5..2...10..3..7....7..3..6....9..6.10...10..4..2....3..8.10
..6..8..5....6..4.10....6..8..9...11..8.10...11..7..5...11..6..5....7..4..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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