A264265 Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having index change +-(.,.) 0,0 1,0 or 1,2.

4, 48, 3721, 1143000, 1608491236, 10563801093680, 324302970384650401, 44925988058251637085336

Offset

1,1

Comments

Diagonal of A264272.

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=3
..6..1..2..7....4..1..2..7....0..7..2..3....4..1..2..3....4..1..6..3
..8.11..0..3....0.11.10..3....4..9.10..1....0..5..6.11....0..9..2..7
..4..9.10..5...12.13..6..5....8.15..6..5...12.13.10..7...12..5.14.11
.12.13.14.15....8..9.14.15...12.13.14.11....8..9.14.15....8.13.10.15

Crossrefs

Cf. A264272.

Sequence in context: A239162 A136384 A123373 * A132510 A058311 A189347

Adjacent sequences: A264262 A264263 A264264 * A264266 A264267 A264268

Keyword

nonn

Author

R. H. Hardin, Nov 10 2015

Status

approved