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A264143
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Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change +-(.,.) 0,0 1,-2 or 1,1.
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1
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8, 125, 1440, 15488, 168948, 1903336, 20768650, 228712964, 2514024565, 27630491593, 304037924437, 3343529124864, 36775469678400, 404510148892477, 4449339039778765, 48939316077898664, 538295657554650689
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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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FORMULA
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Empirical recurrence of order 67 (see link above)
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EXAMPLE
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Some solutions for n=4
..0..1..5..3..4....0..1..2..3..4....0..1..2..6..4....0..1..5..6..7
..2..6..7.14..9...11..6.10.14..9....5..3.10.14.12....2..3..4.14..9
.16..8.18.13.17....7..5.15.13..8...16..8..9..7.17...10..8.12.13.17
.15.10.11.12.19...12.16.17.18.19...15.13.11.18.19...15.16.11.18.19
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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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