A201425 Number of n X n 0..2 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.

3, 11, 99, 33740, 28384610, 54217235230, 6095310292410589

Offset

1,1

Comments

Diagonal of A201432.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A201432.

Sequence in context: A120587 A086914 A123996 * A008561 A348154 A072640

Adjacent sequences: A201422 A201423 A201424 * A201426 A201427 A201428

Keyword

nonn

Author

R. H. Hardin, Dec 01 2011

Status

approved