A267557 Number of nX(n+4) arrays of permutations of n+4 copies of 0..n-1 with every element equal to or 1 greater than any north or northeast neighbors modulo n and the upper left element equal to 0.

1, 462, 2109, 18530, 252726, 5621462, 200130901, 11067625668

Offset

1,2

Comments

Superdiagonal 4 of A267553.

Links

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

Example

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

Crossrefs

Cf. A267553.

Sequence in context: A202642 A158627 A267567 * A154056 A236350 A364848

Adjacent sequences: A267554 A267555 A267556 * A267558 A267559 A267560

Keyword

nonn

Author

R. H. Hardin, Jan 17 2016

Status

approved