A264587 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 1,0 0,-1 1,2 or -1,1.

0, 8, 6, 104, 553, 2232, 21312, 86812, 553861, 3407800, 16888371, 108293432, 590867753, 3371103500, 19838294637, 109788155032, 640910245323, 3646664185104, 20751408860377, 119635268746040, 679631607840939

Offset

1,2

Comments

Row 4 of A264583.

Links

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

Example

Some solutions for n=4
..1..2..3..4..8....1..5..3..4..8....1..2..3..7..8....1..2..3..7..8
..6.10..0.12.13....0..7..2.12.13....0.10.11..9..4....6.10..0..9..4
..5.15..7.17..9...11.15.16..6..9....5..6.13.14.18...11.12..5.17.18
.16.20.18.11.14...10.20.18.19.14...16.20.12.19.23...16.20.21.13.14
.21.22.23.24.19...21.22.23.24.17...21.22.15.24.17...15.22.23.24.19

Crossrefs

Cf. A264583.

Sequence in context: A058088 A248291 A038284 * A265024 A051762 A247017

Adjacent sequences: A264584 A264585 A264586 * A264588 A264589 A264590

Keyword

nonn

Author

R. H. Hardin, Nov 18 2015

Status

approved