A264510 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,1 0,-1 0,1 or 1,0.

4, 8, 149, 1224, 11464, 105324, 934515, 8447072, 74853911, 667307316, 5910551849, 52402729032, 463749831684, 4103713013772, 36294105886533, 320942829301896, 2837528947062683, 25084989795765540, 221746618032948331

Offset

1,1

Comments

Row 4 of A264506.

Links

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

Example

Some solutions for n=4
..1..2..3..7..8....1..0..3..4..8....1..2..6..4..3....1..2..6..4..3
..0..5..6..9..4....6..5..2..9.13....0..7..8.12.13....0.10..8..7.13
.11.15.13.12.18...11.12..7.14.18....5.10.11.17..9....5.15.11.14..9
.10.20.16.19.14...10.15.16.22.23...16.15.18.22.14...16.20.12.17.18
.21.22.17.24.23...21.20.17.24.19...21.20.23.24.19...21.22.23.24.19

Crossrefs

Cf. A264506.

Sequence in context: A012498 A180745 A330860 * A188268 A133262 A120822

Adjacent sequences: A264507 A264508 A264509 * A264511 A264512 A264513

Keyword

nonn

Author

R. H. Hardin, Nov 15 2015

Status

approved