A267834 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to or 1 greater than any northeast neighbor modulo n and the upper left element equal to 0.

1, 35, 829, 19696, 499523, 13895954, 422626232, 14039428460, 507351298590

Offset

1,2

Comments

Column 4 of A267836.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A267836.

Sequence in context: A249884 A223957 A109508 * A001724 A062194 A004372

Adjacent sequences: A267831 A267832 A267833 * A267835 A267836 A267837

Keyword

nonn

Author

R. H. Hardin, Jan 21 2016

Status

approved