A264291 Number of (7+1) X (n+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

1, 1252, 40692, 1308629, 68815948, 2943284092, 126311779972, 5624085093712, 246768571746441, 10829936933432708, 476292923791748201, 20916681831526205985, 918103119293113999349, 40284306184645115520403

Offset: 1

Author

R. H. Hardin, Nov 10 2015

Keywords

• nonn

Comments

Row 7 of A264285.

Examples

			Some solutions for n=3
..0..1..2..3....0..7..1..2....6..7..1..2....0..7..1..3....6..1..2..3
..4.11..6..7....4.11..6..3....0.11..5..3....4..5..2..6....0..4..5..7
..8..5..9.10....8..5..9.10....4..8..9.10...14..9.10.11....8.15..9.10
.12.19.13.14...18.12.13.14...12.19.13.14....8.12.13.15...18.12.14.11
.16.23.18.15...16.23.17.15...22.16.17.15...16.23.17.18...16.13.17.19
.20.17.21.22...20.21.22.19...20.21.18.23...20.21.22.19...20.21.22.23
.24.31.25.27...24.25.26.27...24.31.25.27...30.24.26.27...24.31.26.27
.28.29.26.30...28.29.30.31...28.29.26.30...28.25.29.31...28.25.29.30
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..53

Crossrefs

Cf. A264285.