A264368 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,0 0,2 1,0 or -1,-2.

1, 28, 784, 7168, 65536, 730368, 8139609, 86397399, 917060089, 9745523645, 103564894225, 1098865637220, 11659411209744, 123652174760256, 1311374995519744, 13905429141268656, 147449021266573569

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Row 4 of A264364.

Examples

			Some solutions for n=4
..0..8..9..3..4....7..8..9..1..2....7..1..9..3..2....0..1..9..3..2
..5..1..2..6..7....0.13.14..3..4....0.13..5..6..4....5..6..7..8..4
.17.11.10.13.14....5..6.10.11.12...10.11.12..8.14...10.11.12.13.14
.22.23.12.16.19...15.23.17.16.19...22.23.17.16.19...22.16.15.18.19
.15.21.20.18.24...20.21.22.18.24...15.21.20.18.24...20.21.17.23.24
		

Links

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

Crossrefs

Cf. A264364.