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A206980
Number of n X n 0..1 arrays avoiding the patterns 0 1 0 or 1 0 1 in any row, column, diagonal or antidiagonal
0
2, 16, 58, 556, 7500, 119224, 2926752, 111202694, 5582239354, 398193149976, 43178426815216, 6623459579619334, 1414003622686654366, 443957184641073369216
OFFSET
1,1
COMMENTS
Diagonal of A206987
EXAMPLE
Some solutions for n=4
..1..0..0..0....0..1..1..1....1..0..0..1....1..1..0..0....1..1..0..0
..0..0..0..0....1..1..1..0....0..0..0..1....0..0..0..0....1..0..0..0
..0..0..0..1....1..1..1..0....0..0..0..1....0..0..0..0....0..0..0..0
..1..1..1..1....0..1..1..0....1..0..0..1....1..0..0..0....0..0..0..1
CROSSREFS
Sequence in context: A091914 A123791 A293620 * A357816 A170991 A209219
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved