A264385 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

1, 1343, 156293, 11888603, 1363452981, 149731056598, 16353452350876, 1735328063172744, 188810032043800381, 20288902506786356394, 2189915587683013427440, 235922552838031495595870

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Row 7 of A264379.

Examples

			Some solutions for n=3
..4..5..3..7....1..5..6..7....4..2..6..7....1..2..6..7....1..2..4..5
..0..1..2..9....0..9..2..3....0..1..8..3....0..9.10..3....0..9..8..3
.12.10..6.15....4.10.14.13....9..5.12.13....4..5.12.13...12.10..6..7
..8.14.16.11....8.17.16.11...16.14.10.17....8.17.15.11...13.14.18.11
.20.13.19.23...12.21.20.15...20.11.22.23...20.18.14.21...17.21.20.15
.21.17.18.25...24.22.23.25...21.15.18.19...16.25.23.19...16.22.26.25
.28.29.22.31...18.19.28.31...28.29.30.31...28.26.22.29...28.19.30.29
.24.30.26.27...29.30.26.27...24.25.26.27...24.30.31.27...24.23.31.27
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..33

Crossrefs

Cf. A264379.