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A184448
1/36 the number of (n+2) X (n+2) 0..2 arrays with each 3 X 3 subblock containing two of one value, two of another, and five of the last.
0
63, 600, 3125, 11766, 53350, 196974, 660654
OFFSET
1,1
COMMENTS
Diagonal of A184457.
EXAMPLE
Some solutions with a(1,1)=0 for 4 X 4
..0..0..0..0....0..1..1..0....0..0..2..0....0..1..0..0....0..1..2..0
..0..0..1..0....2..1..2..2....0..1..2..0....0..0..2..0....1..0..0..2
..1..2..2..1....1..1..0..1....0..0..1..0....1..2..0..1....2..0..0..1
..1..1..1..1....0..1..1..0....0..0..2..0....0..1..0..0....2..0..1..2
CROSSREFS
Cf. A184457.
Sequence in context: A307527 A217264 A179537 * A228262 A340902 A181125
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 14 2011
STATUS
approved