A201065 Number of n X n 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

7, 70, 514, 22440, 2250982, 45244488, 1001060834, 1438433201164

Offset

1,1

Comments

Diagonal of A201072.

Links

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

Example

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

Crossrefs

Cf. A201072.

Sequence in context: A003363 A069542 A063416 * A043034 A015251 A299870

Adjacent sequences: A201062 A201063 A201064 * A201066 A201067 A201068

Keyword

nonn

Author

R. H. Hardin Nov 26 2011

Status

approved