A264634 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.

6, 64, 832, 19521, 389512, 7201068, 145801320, 2894056084, 55482368576, 1083985544985, 21146352754070, 408087901833692, 7923037689375810, 153609972224719312, 2971979031834135932, 57595394302971820088

Offset

1,1

Comments

Row 7 of A264628.

Links

R. H. Hardin, Table of n, a(n) for n = 1..170

Example

Some solutions for n=4
..1..2..7..4..9....1..2..7..4..9....1..2..3..4..9....5..6..3..4..9
..6..0.12.13..3....6..0..8.18..3...10..0.12.13.14...10..0..1..2.14
.11..5.17.14..8...15..5.17.14.19...11..5..6..7..8...15.12.13..7..8
.20.10.18.19.29...16.10.11.12.13...20.17.22.19.29...20.21.11.19.24
.21.15.16.24.34...30.22.23.24.34...25.15.16.24.18...25.22.16.17.18
.26.31.32.22.23...35.20.21.29.39...30.27.21.38.23...35.27.37.29.23
.35.25.37.27.28...31.25.26.27.28...35.32.26.34.28...31.32.26.34.28
.36.30.38.39.33...36.37.38.32.33...36.37.31.39.33...36.30.38.39.33

Crossrefs

Cf. A264628.

Sequence in context: A309186 A156887 A239847 * A296165 A173500 A141008

Adjacent sequences: A264631 A264632 A264633 * A264635 A264636 A264637

Keyword

nonn

Author

R. H. Hardin, Nov 19 2015

Status

approved