A264384 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

0, 347, 22484, 828400, 48714516, 2546661201, 135926940964, 7028273171990, 373730198247984, 19642240165929614, 1037225681776050162, 54639267702225385178, 2881673580028315975296, 151886941377998952959800

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Row 6 of A264379.

Examples

			Some solutions for n=3
..1..5..4..7....4..2..6..5....4..2..3..7....1..2..4..7....1..2..4..5
..0..6.10.11....0..1..8..3....0..1..8.11....0..6..8..3....0..6..8..9
..2..3.12.15....9.10.11.13...12..5.14.13....9..5.12.13...12..3.11..7
..8..9.18.19...16..7.15.17....6..9.10.19...16.17.10.19...13.14.15.19
.20.13.14.21...12.18.19.21...17.18.22.21...20.11.14.15...10.18.22.21
.16.17.24.27...14.25.24.27...16.15.24.25...24.22.26.25...16.17.24.25
.25.26.22.23...20.26.22.23...20.26.27.23...18.21.27.23...20.26.27.23
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..102

Crossrefs

Cf. A264379.