A264883 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.

4, 0, 137, 108, 19372, 207424, 4747695, 78535556, 1314624443, 22908798620, 367507064798, 6308520502938, 101920859207417, 1716067465404634, 28013671881647327, 465628347016848772, 7646941659349897210

Offset: 1

Author

R. H. Hardin, Nov 27 2015

Keywords

• nonn

Comments

Row 6 of A264878.

Examples

			Some solutions for n=4
..1..2.12..4.14....1..2..3..4.14...10..2..3..4.14....1..2.12..4.14
..6..0..8..9..3....6..0.17..9.19....6..0..1..9.19....6..0..8..9..3
.11..5.22..7.24...20..5.22..7..8...11..5.22..7..8...11..5.13..7.24
.25.10.27.19.13...16.10.11.12.13...25.17.27.12.13...25.10.18.19.29
.30.15.16.17.18...30.15.32.24.18...30.15.16.24.18...30.15.16.17.34
.26.20.21.29.23...26.27.21.29.23...26.20.21.29.23...26.20.21.22.23
.31.32.33.34.28...31.25.33.34.28...31.32.33.34.28...31.32.33.27.28
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..186

Crossrefs

Cf. A264878.