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A264679
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Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.
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1
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0, 19, 145, 890, 9205, 88687, 714235, 5871821, 50048019, 422792433, 3525222983, 29504247476, 247603962409, 2074917109436, 17373094676114, 145530813422748, 1219291683848838, 10213817024920997, 85555541651802803, 716687147462600097
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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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FORMULA
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Empirical recurrence of order 81 (see link above)
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EXAMPLE
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Some solutions for n=4
..6..0..1..2..3...12..0..1..9..3....6..0..1..2..3....6..0..1..2..3
.17.12.13..7..4...11.18..2..7..4...12..5.19..7..4...17.12.14..7..4
..5.18.11..8..9....5..6.24..8.13...16.10.11..8..9....5.23.24..8..9
.10.23.16.24.14...10.23.16.17.14...21.22.24.13.14...10.11.16.13.18
.15.20.21.22.19...15.20.21.22.19...15.20.17.18.23...15.20.21.22.19
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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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