A264370 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,0 0,2 1,0 or -1,-2.

1, 129, 16641, 418992, 10549504, 353333680, 11834176225, 371455955580, 11659411209744, 368071661804736, 11619518840752384, 365901756932584896, 11522344217627105424, 362249271223489619136, 11388701120488963432704

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Row 6 of A264364.

Examples

			Some solutions for n=3
..0..1..2..3....6..7..2..1....6..1..0..3....6..7..0..3....0..1..2..3
.10..5..4..7....0.11..4..3...10..5..2..7....4..1..2..5....4..5..6..7
.14..9..6.11...14..5..8..9....4..9..8.11....8..9.10.11....8..9.10.11
..8.13.12.15...12.13.10.15...18.13.14.15...12.19.14.13...18.19.12.15
.16.17.18.19...22.23.16.17...12.23.16.17...22.17.16.15...16.13.14.17
.26.27.20.21...20.27.18.19...20.21.22.19...26.27.18.23...20.27.22.21
.24.25.22.23...24.21.26.25...24.25.26.27...20.21.24.25...24.25.26.23
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..22

Crossrefs

Cf. A264364.