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A186622 Number of (n+2)X3 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards. 1
19683, 317115, 5109075, 82312875, 1033357725, 12972796635, 162860787181, 1762332055974, 19070362665396, 206362206802584, 2024796890931192, 19867021743214296, 194932417524520248, 1785642965511020136 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A186625
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2011
STATUS
approved

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Last modified March 19 02:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)