A264377 Number of (n+1)X(6+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.

15, 121, 14329, 711068, 45132986, 2546661201, 149731056598, 8620411258657, 499872831041401, 28871184063697655, 1669447411395132846, 96462826329498703173, 5574683427373667949652, 322122388885074528092794

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Column 6 of A264379.

Examples

			Some solutions for n=3
..7..2..3..4..5.12.11....7..2..3..8..5.12.13....7..2..9..8..5.10.13
..0..1.10.17.18.13..6....0..1.14.11..4.17.18....0..1.16..3..4.17.18
.21..8..9.22.23.24.27...15.22.21.10..6.24.27...15.22.21.24..6.12.27
.14.15.16.25.26.19.20....9.23.16.25.26.19.20...14.23.11.25.26.19.20
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..136

Crossrefs

Cf. A264379.