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A264367
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Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,0 0,2 1,0 or -1,-2.
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1
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1, 13, 169, 936, 5184, 33408, 215296, 1323792, 8139609, 50261301, 310358689, 1916465345, 11834176225, 73043905820, 450847788304, 2783165854192, 17180991840016, 106056375378580, 654674355426025, 4041262228505645
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..7..1..0..3..4....7..1..0..3..4....0..8..9..3..2....7..1..0..3..4
..5..6..2..8..9....5..6..2..8..9....5..1.14..6..4...12..6..2..8..9
.10.18.19.13.12...10.18.12.13.14...10.18..7.13.12....5.18.19.11.14
.15.11.17.16.14...15.11.17.16.19...15.11.17.16.19...10.16.15.13.17
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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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