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A204409
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way
1
3570, 154938, 947990, 11785518, 253954944, 2050960896, 27153833472, 585112190976, 4725413904384, 62562432319488, 1348098488008704, 10887353635700736, 144143844064100352, 3106018916372054016
OFFSET
1,1
COMMENTS
Diagonal of A204417
LINKS
EXAMPLE
Some solutions for n=3
..1..1..1..2..0....0..0..2..2..2....0..0..2..0..1....2..2..1..1..0
..1..0..1..2..1....0..1..0..1..2....0..0..0..1..0....0..0..1..2..1
..0..1..2..1..2....1..2..2..1..0....0..1..2..2..1....0..1..2..2..2
..1..1..0..1..2....2..0..1..2..1....1..0..1..2..2....0..0..0..1..2
..0..0..1..2..0....0..1..2..1..2....0..1..0..1..2....2..0..1..2..2
CROSSREFS
Sequence in context: A071144 A204417 A204410 * A152217 A004932 A004952
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
STATUS
approved