A264548 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.

3, 96, 764, 11728, 163744, 1994830, 25172836, 316806958, 3939510885, 49105816488, 612105030734, 7621730718736, 94917598135688, 1182099712180116, 14720466321079700, 183312321420648794, 2282783100595945090

Offset: 1

Author

R. H. Hardin, Nov 17 2015

Keywords

• nonn

Comments

Column 6 of A264550.

Examples

			Some solutions for n=4
..1..7..3..4.10..6.12....1..7..3..4.10.11.12....1..2..8..4.10..6.11
..0..9..2.11.16..5.18....0..9..2.16.17..5..6....0.14.15..3.12..5.19
.15..8.17.22.23.20.13...15..8.22.18.23.20.13....7.16..9.18.23.25.13
.14.28.29.25.26.19.32...14.28.29.25.26.19.32...22.28.29.17.26.32.20
.21.30.31.24.33.34.27...21.30.31.24.33.34.27...21.30.31.24.33.34.27
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Crossrefs

Cf. A264550.