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A209889
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having two distinct values, and new values 0..2 introduced in row major order
0
7, 280, 32800, 11857440, 13410113952, 48053885453696, 549425473875967488, 20157265447359860793760, 2382356941753966065667915808, 909958586859400389363702903272960
OFFSET
1,1
COMMENTS
Diagonal of A209897
EXAMPLE
Some solutions for n=4
..0..0..1..1..1....0..0..1..1..1....0..0..0..1..1....0..1..0..2..1
..1..0..1..2..2....2..0..0..0..0....2..0..1..0..1....0..1..0..2..1
..0..1..1..2..1....2..0..1..1..1....2..0..1..0..0....0..0..0..2..2
..1..0..1..2..1....2..0..0..0..1....2..0..1..0..1....0..1..0..2..0
..1..1..1..1..1....2..2..0..1..0....2..0..0..0..1....0..1..0..2..0
CROSSREFS
Sequence in context: A065581 A062646 A009503 * A176072 A096548 A160072
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2012
STATUS
approved