A264495 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.

121, 2960, 92052, 2870927, 89130069, 2775259622, 86190450233, 2677639248483, 83164917517453, 2583078930390035, 80227727864116428, 2491794046923957866, 77392440292663757309, 2403726490469501987884, 74657152069390240763825

Offset: 1

Author

R. H. Hardin, Nov 14 2015

Keywords

• nonn

Comments

Row 7 of A264490.

Examples

			Some solutions for n=3
..4..5..3..7....4..5..3..7....4..5..6..7....4..5..6..7....4..2..6..7
..0..6.10.11....0..1.10.11....8..9.10..3....0..9..2..3....0..1.10..3
.12..2..1.15...12.13..6..2...12..0..1..2...12.13..1.15...12.13.11.15
..8..9.18.19...16.17.18.19...22.17.18.11...16.14.18.11....8.17..5.19
.17.21.14.23....9..8.22.15...26.13.14.23...20..8.19.10...20.18..9.23
.16.25.13.27...24.25.26.14...16.25.15.19...24.17.26.27...16.25.26.14
.28.29.30.31...28.21.30.31...28.29.30.31...28.29.30.31...28.29.27.31
.24.20.26.22...29.20.23.27...24.20.21.27...21.25.23.22...24.30.21.22
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..119

Crossrefs

Cf. A264490.