A267281 Number of nX(n+2) arrays of permutations of n+2 copies of 0..n-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo n and the upper left element equal to 0.

1, 35, 574, 12214, 330969, 12954512, 912215513

Offset

1,2

Comments

Superdiagonal 2 of A267278.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=4
..0..0..0..1..1..2....0..2..1..0..3..1....0..0..2..2..3..3....0..3..2..1..3..2
..3..0..1..1..2..2....1..1..3..2..0..3....3..1..1..2..2..3....3..1..0..2..1..3
..3..0..0..2..2..3....0..2..2..3..2..0....0..0..1..1..3..2....1..3..2..0..3..1
..3..3..1..1..3..2....1..1..3..2..0..3....0..0..1..2..1..3....2..1..0..2..0..0

Crossrefs

Cf. A267278.

Sequence in context: A219370 A278674 A219468 * A114342 A208617 A010951

Adjacent sequences: A267278 A267279 A267280 * A267282 A267283 A267284

Keyword

nonn

Author

R. H. Hardin, Jan 12 2016

Status

approved