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A181213
Number of n X n binary matrices with no three 1's adjacent in a line diagonally or antidiagonally
1
2, 16, 400, 28561, 7133488, 5037592576, 11494250657760, 81903288018125025, 1774095560440527819780, 120560883729040740095954944, 25387802734116842287569948104640, 16523941893729018365186706701633818689
OFFSET
1,1
COMMENTS
Diagonal of A181217
LINKS
EXAMPLE
Some avoided solutions for 4X4
..1..0..0..0....0..0..0..0....0..0..0..1....0..1..0..0....0..0..1..0
..0..1..0..0....0..0..1..1....0..1..1..0....0..0..1..0....0..1..0..0
..0..0..1..1....0..0..1..0....0..1..0..0....1..0..0..1....1..0..0..0
..0..0..0..0....0..1..0..0....0..0..0..0....0..0..0..0....0..0..1..0
CROSSREFS
Sequence in context: A188904 A189104 A347914 * A283851 A130276 A027871
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved