A250584 Number of (n+1)X(n+1) 0..2 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction

40, 825, 17718, 379397, 7838610, 157109231, 3053953408, 58004548986, 1079249449510, 19767161106242, 357114500472550, 6382421843315156, 112996863345488574, 1985335360177376640, 34647966432663124048

Offset

1,1

Comments

Diagonal of A250592

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A162176 A162402 A010992 * A004421 A247411 A250986

Adjacent sequences: A250581 A250582 A250583 * A250585 A250586 A250587

Keyword

nonn

Author

R. H. Hardin, Nov 25 2014

Status

approved