OFFSET
1,1
COMMENTS
Diagonal of A260248
EXAMPLE
Some solutions for n=4
..0..1..0..0..0..1....0..1..0..0..0..0....0..1..0..0..0..1....1..0..0..0..0..1
..0..0..0..0..0..0....0..0..0..0..1..0....0..0..0..0..1..0....0..1..0..0..1..0
..0..0..1..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..1
..0..0..0..1..0..0....0..1..0..0..0..0....0..1..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..1..0..0..1....0..0..1..0..0..1....0..0..1..0..0..0
..1..0..1..0..0..0....0..0..0..0..1..0....0..0..0..0..0..0....0..0..0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 20 2015
STATUS
approved