A268118 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 north or west neighbors modulo n and the upper left element equal to 0.

1, 35, 114, 1256, 23522, 726627, 36708187, 3039274773

Offset

1,2

Comments

Superdiagonal 2 of A268115.

Links

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

Example

Some solutions for n=5
..0..0..1..2..2..3..4....0..0..1..1..2..2..3....0..1..2..2..3..3..4
..1..1..2..2..3..4..0....1..1..2..2..3..3..4....1..2..3..3..4..4..0
..1..2..3..3..4..0..0....2..2..2..3..4..4..0....2..2..3..4..0..0..1
..2..3..3..4..4..0..1....3..3..3..4..0..0..0....2..3..4..4..0..1..1
..2..3..4..4..0..1..1....4..4..4..0..1..1..1....2..3..4..0..0..1..1

Crossrefs

Cf. A268115.

Sequence in context: A156332 A110832 A251269 * A374809 A212888 A044286

Adjacent sequences: A268115 A268116 A268117 * A268119 A268120 A268121

Keyword

nonn

Author

R. H. Hardin, Jan 26 2016

Status

approved