A264480 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,1 1,0 2,1 or -1,-1.

1, 32, 124, 2232, 24773, 310748, 4039259, 50217832, 620351086, 7791932046, 96985215280, 1205278291192, 15033721660535, 187188468194402, 2330142431854154, 29024775202912332, 361434709901725109

Offset

1,2

Comments

Row 6 of A264476.

Links

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

Example

Some solutions for n=4
..6..7..8..9..3....6..0..1..2..3....6..0..8..9..3....6..0..8..2..3
..0..1..2.14..4...11.12.13.14..4...11..1..2.14..4...11..1.13..7..4
..5.17.11.19.13....5.10..7..8..9...16.10..7.19.13....5.17.18.19..9
.10.22.12.24.18...21.15.23.17.18...21..5.12.24.18...10.22.16.24.14
.26.27.21.29.23...26.27.28.29.19...26.27.17.22.23...26.27.21.12.23
.20.15.16.34.28...20.32.16.34.24...20.15.33.34.28...20.15.33.34.28
.25.30.31.32.33...25.30.31.22.33...25.30.31.32.29...25.30.31.32.29

Crossrefs

Cf. A264476.

Sequence in context: A005903 A344219 A271532 * A247155 A239728 A244082

Adjacent sequences: A264477 A264478 A264479 * A264481 A264482 A264483

Keyword

nonn

Author

R. H. Hardin, Nov 14 2015

Status

approved