A201094 Number of n X n 0..7 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

8, 140, 252, 2490, 1445712, 2244318652, 80495995176, 4031708477982

Offset

1,1

Comments

Diagonal of A201101.

Links

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

Example

Some solutions for n=4
..0..0..3..3....0..0..1..4....0..0..2..3....0..0..3..5....0..0..3..4
..1..1..4..6....1..2..5..5....1..2..4..6....1..1..4..5....1..1..5..5
..2..4..5..6....2..3..6..7....1..3..5..7....2..2..6..6....2..2..6..7
..2..5..7..7....3..4..6..7....4..5..6..7....3..4..7..7....3..4..6..7

Crossrefs

Cf. A201101.

Sequence in context: A187236 A301835 A091060 * A061996 A345650 A092703

Adjacent sequences: A201091 A201092 A201093 * A201095 A201096 A201097

Keyword

nonn

Author

R. H. Hardin, Nov 26 2011

Status

approved