A223825 Number of n X n 0..2 arrays with rows and columns unimodal

3, 81, 6166, 738482, 111026387, 18986502099, 3529435151262, 698068937559304

Offset

1,1

Comments

Diagonal of A223831

Links

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

Example

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

Crossrefs

Sequence in context: A355157 A207229 A223717 * A207222 A207007 A223783

Adjacent sequences: A223822 A223823 A223824 * A223826 A223827 A223828

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved