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A263387
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Number of (n+1)X(3+1) arrays of permutations of 0..n*3-1 with each element moved a city block distance of exactly 2.
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1
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16, 1600, 70225, 2205225, 85599504, 3623076864, 146943422224, 5787820712521, 230179176125649, 9243027274360896, 370481900615995536, 14801700800476792449, 591533534101543481889, 23664671468723798926336
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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
..8..3..7..6....5..4..7..6....8..3.10.11....2..9..7..6....2..6..5.11
..1.10..9..2...12.13..9.15....1.13.14..2....1.10.11..5....9..8..4.10
..0.11.15.14....0..1..2..3....0..6..5..9....0..4..8..3....0..1.13..3
..4..5.12.13...14..8.11.10....4.15.12..7...14.15.12.13...14.15.12..7
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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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