A265001 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with rows and columns nondecreasing.

1, 3, 14, 112, 1095, 13009, 175865, 2647438, 43347498, 760869739, 14150265025, 276374334318, 5629364791202

Offset

1,2

Comments

Column 4 of A265005.

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A265005.

Sequence in context: A121951 A276751 A085244 * A279429 A333797 A229113

Adjacent sequences: A264998 A264999 A265000 * A265002 A265003 A265004

Keyword

nonn

Author

R. H. Hardin, Nov 29 2015

Status

approved