A264881 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 0,-1 -2,0 or 1,1.

2, 0, 20, 12, 572, 2348, 22152, 129230, 915192, 5625202, 37271957, 233347958, 1512344735, 9550825980, 61315204660, 389091647972, 2487355416820, 15822559226124, 100953094987052, 642909203731360, 4098621203473156

Offset: 1

Author

R. H. Hardin, Nov 27 2015

Keywords

• nonn

Comments

Row 4 of A264878.

Examples

			Some solutions for n=4
..1..2.12..4.14....1..2..3..4.14....1..2..3..4.14....1..2.12..4.14
.15..0.17..9..3...15..0..8..9.19....6..0.17..9.19...15..0..8..9..3
.20..5..6..7..8...20..5..6..7.24...20..5.22..7..8...20..5..6..7.24
.16.10.11.19.13...16.10.11.12.13...16.10.11.12.13...16.10.11.19.13
.21.22.23.24.18...21.22.23.17.18...21.15.23.24.18...21.22.23.17.18
		

Links

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

Crossrefs

Cf. A264878.