A264518 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.

6, 8, 644, 8018, 169195, 2856816, 50099452, 868998834, 14882827790, 256959272592, 4398347029348, 75624723708092, 1295898634983579, 22241860959497984, 381337803827858013, 6540985297761847920, 112164265361793394334

Offset: 1

Author

R. H. Hardin, Nov 16 2015

Keywords

• nonn

Comments

Column 6 of A264520.

Examples

			Some solutions for n=4
..9..8..0.12..2..3.13....9..8.11.12..2..3..4....9.10..0..1.13.12..4
.16..1.18.17..4..5..6....0..1.16.17.20..5..6...16.15..2..3.20..5..6
..7.24.23.10.11.26.27....7.24.14.10.25.26.13....7..8.14.24.11.17.18
.14.15.30.33.34.19.20...28.15.32.33.18.19.34...30.31.32.33.23.19.34
.21.22.28.29.25.31.32...21.22.23.29.30.31.27...21.22.28.29.25.26.27
		

Links

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

Crossrefs

Cf. A264520.