A200983 Number of n X n 0..4 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

5, 10, 92, 1225, 4919, 752271, 29555346, 1278883650, 65182166083, 731587297275

Offset

1,1

Comments

Diagonal of A200990

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A325583 A344194 A120598 * A344140 A267042 A119137

Adjacent sequences: A200980 A200981 A200982 * A200984 A200985 A200986

Keyword

nonn

Author

R. H. Hardin Nov 25 2011

Status

approved