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A204400
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally
1
4293, 347247, 18913491, 2085204465, 218058070601, 17377299440327, 2207029201023771, 240737453125833231, 17889166072227529737, 2455122309608558423403, 250675639538425127676495
OFFSET
1,1
COMMENTS
Diagonal of A204408
LINKS
EXAMPLE
Some solutions for n=3
..2..2..1..1..0....1..0..0..1..0....0..0..2..1..0....1..1..1..1..0
..0..0..1..2..1....2..2..1..0..0....2..1..2..0..0....2..0..1..2..1
..0..1..2..0..2....0..0..2..1..1....1..2..0..1..2....0..1..2..1..2
..2..1..0..1..2....0..1..2..2..0....0..1..2..2..1....2..1..0..1..2
..1..1..2..2..0....0..2..0..1..2....2..0..1..2..2....1..0..1..2..0
CROSSREFS
Sequence in context: A233888 A204408 A204401 * A271104 A234164 A124596
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
STATUS
approved