A212937 Number of n X n 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows.

1, 7, 9019, 2509306671, 212180664326328751, 8389667096561737605103329223, 227328735342370296661661894900118524516359, 5846438367263951495694598571033398108516477233229168235359

Offset

1,2

Comments

Diagonal of A212943.

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Cf. A212943.

Sequence in context: A234626 A201846 A116631 * A074489 A067248 A152007

Adjacent sequences: A212934 A212935 A212936 * A212938 A212939 A212940

Keyword

nonn

Author

R. H. Hardin, May 31 2012

Status

approved