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A230178
Number of n X n 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j)
1
0, 9, 231, 73857, 133265847, 1576417829097, 117863748242661711, 56231441027001164749647, 170772883022204028026156020737, 3303166614870365380110300414534929643
OFFSET
1,2
COMMENTS
Diagonal of A230184
LINKS
EXAMPLE
Some solutions for n=3
..1..1..1....1..1..2....1..1..1....2..0..1....2..0..0....2..0..2....0..2..2
..1..2..0....1..0..2....1..1..0....2..1..1....0..2..2....1..1..1....2..0..2
..0..2..0....2..1..1....1..2..0....1..1..1....2..0..2....1..2..0....2..1..1
CROSSREFS
Sequence in context: A247019 A181205 A152101 * A165389 A153223 A276536
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 11 2013
STATUS
approved