A264278 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having index change +-(.,.) 0,0 1,0 or 1,2.

1156, 397970, 137007025, 28735927165, 6027088830169, 1398071103483637, 324302970384650401, 73860692068418320661, 16821929895847549418521, 3842838461170279448197621

Offset

1,1

Comments

Row 7 of A264272.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=1
..2..1....0..3....0..1....2..1....0..1....0..3....2..1....0..1....0..3....2..1
..0..5....4..1....4..5....0..3....4..3....2..1....0..5....2..3....2..1....0..3
..4..3....2..7....2..3....6..5....2..5....6..5....6..3....6..7....4..5....6..7
..8..7....8..5....6..7....4..7....6..7....4..7....4..7....4..5....6..7....4..5
..6..9....6.11....8.11...10.11....8..9....8..9...10.11....8..9...10.11...10.11
.12.11...10..9...10..9....8..9...10.13...10.13....8..9...10.13....8..9....8..9
.10.13...14.13...12.15...12.15...12.11...12.11...14.13...12.11...12.15...14.15
.14.15...12.15...14.13...14.13...14.15...14.15...12.15...14.15...14.13...12.13

Crossrefs

Cf. A264272.

Sequence in context: A189279 A264271 A264089 * A217279 A204478 A031746

Adjacent sequences: A264275 A264276 A264277 * A264279 A264280 A264281

Keyword

nonn

Author

R. H. Hardin, Nov 10 2015

Status

approved