A200706 Number of n X n 0..7 arrays with every row and column running average nondecreasing rightwards and downwards

8, 540, 317656, 1630978608, 71952946981858

Offset

1,1

Comments

Diagonal of A200713

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=3
..0..0..1....0..0..2....0..2..4....0..0..0....0..0..3....0..4..4....0..0..0
..0..1..7....7..7..7....3..4..4....2..5..6....1..2..3....4..4..7....4..4..4
..0..5..7....6..6..7....3..5..4....3..7..7....1..4..3....3..4..7....3..6..6

Crossrefs

Sequence in context: A145182 A089671 A112035 * A266207 A027536 A334255

Adjacent sequences: A200703 A200704 A200705 * A200707 A200708 A200709

Keyword

nonn

Author

R. H. Hardin Nov 20 2011

Status

approved