A186622 Number of (n+2)X3 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

19683, 317115, 5109075, 82312875, 1033357725, 12972796635, 162860787181, 1762332055974, 19070362665396, 206362206802584, 2024796890931192, 19867021743214296, 194932417524520248, 1785642965511020136

Offset

1,1

Comments

Column 1 of A186625

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4X3
..0..0..1....0..0..2....0..0..1....0..0..2....0..1..1....0..0..0....0..1..1
..1..1..1....2..0..0....0..1..1....2..0..1....0..2..1....2..1..0....1..0..1
..0..0..1....1..0..2....1..1..0....0..1..0....1..1..1....2..2..0....0..1..0
..1..1..2....2..0..2....2..1..2....1..0..2....1..2..2....0..0..1....2..0..1

Crossrefs

Sequence in context: A250507 A250505 A186625 * A250459 A250455 A016761

Adjacent sequences: A186619 A186620 A186621 * A186623 A186624 A186625

Keyword

nonn

Author

R. H. Hardin, Feb 24 2011

Status

approved