A264146 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having index change +-(.,.) 0,0 1,-2 or 1,1.

64, 9261, 1440000, 117534144, 12968882161, 1376159333484, 147813083354689, 15629429778886656, 1668183383627274240, 177524398873895731200, 18903690233550713749504

Offset

1,1

Comments

Row 6 of A264142.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=2
..4..5..2....0..1..3....0..5..3....0..1..3....4..5..2....0..1..2....4..5..2
..7..0..1....2..8..5....2..4..1....2..4..5....3..0..1....3..8..6....3..0..1
..6..3..9....6..7..4....6..7..8....6..7..8...10.11..8....5..7..4....6..7..9
..8.10.11...13.10.11....9.14.12....9.10.11....9..6..7....9.10.12....8.14.11
.16.13.14...12..9.14...11.17.10...12.13.15...16.13.14...11.17.14...12.17.10
.19.12.17...15.16.18...19.16.13...14.20.17...19.12.18...19.20.13...15.16.13
.18.15.20...17.19.20...18.15.20...18.19.16...17.15.20...18.15.16...18.19.20

Crossrefs

Cf. A264142.

Sequence in context: A239647 A222140 A093264 * A220731 A239403 A254607

Adjacent sequences: A264143 A264144 A264145 * A264147 A264148 A264149

Keyword

nonn

Author

R. H. Hardin, Nov 04 2015

Status

approved