A264525 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.
1, 46, 2116, 65182, 2007889, 50099452, 1250046736, 33040712340, 873318285225, 23316358581360, 622513677650176, 16358436196050416, 429867558557693881
Offset: 1
Keywords
Examples
Some solutions for n=4 ..7..6..0..8..2....5..6..7..8..2....7..6..9..1..2....7..6..9..1..2 .10..1.14..3..4....0..1.12..3..4....0.11.12..3..4....0.13..5..3..4 ..5.18.19.11..9...17.16.19.11..9....5.18.10..8.19...17.18.19..8.12 .22.21.12.13.17...10.23.22.13.14...22.23.15.13.14...10.11.22.16.14 .15.16.27.28.29...15.28.27.18.29...25.16.17.28.29...15.26.27.21.29 .20.33.25.23.24...20.21.25.26.24...20.21.34.26.24...20.33.25.23.24 .35.26.37.38.39...37.36.39.38.32...35.36.27.38.39...35.38.37.28.39 .30.31.32.36.34...30.31.35.33.34...30.31.32.33.37...30.31.32.36.34
Crossrefs
Cf. A264520.
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