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A264306
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Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,1 0,-2 1,0 or -1,0.
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1
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61, 944, 51825, 1346944, 53407877, 1659712320, 59343473405, 1955070027088, 67490110411793, 2266016041549488, 77301460609942557, 2611942953465635824, 88737349845940685049, 3004808214662968371840, 101938805574695816594665
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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..0..1..2..3.13..5..6....8..9..4..5..3..7.14.15....2..0..4.11.12..7..5..6
.16.11.18.10..4.15.22..7....0..1..2.10.11.12..6.23...10..1..9..3.20.15.22.23
.24..9.20.21.12.23.14.31...24.19.20.18.22.13.21.31....8.25.17.21.19.13.14.31
.26.17.25.19.27.28.29.30...16.17.25.26.27.28.29.30...16.24.18.26.27.28.29.30
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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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