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A267637
Number of n X n 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.
0
1, 8, 51, 1015, 8917, 343145, 3696933, 330654951, 4301737251, 1093232460925
OFFSET
1,2
COMMENTS
Diagonal of A267644.
EXAMPLE
Some solutions for n=5
..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....0..1..1..0..1
..1..0..1..0..0....0..1..1..0..0....1..0..0..1..1....1..0..1..0..1
..1..0..0..1..1....1..0..1..0..1....0..1..1..0..0....0..1..0..1..0
..0..1..0..0..1....0..1..0..1..1....0..1..0..0..1....1..0..1..1..0
..1..0..1..0..0....1..0..1..1..0....1..0..1..1..0....1..1..0..0..1
CROSSREFS
Cf. A267644.
Sequence in context: A348312 A295602 A226199 * A238648 A341626 A215834
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 18 2016
STATUS
approved