OFFSET
1,4
COMMENTS
Diagonal of A183391
EXAMPLE
Some solutions with a(1,1)=0 for 8X8
..0..0..0..0..0..0..0..0....0..0..0..0..0..1..1..1....0..0..0..1..1..0..0..0
..0..0..1..1..0..0..0..0....0..0..0..0..0..1..1..1....0..0..0..1..1..0..0..0
..0..1..1..1..1..0..0..0....1..1..1..0..0..1..1..1....0..0..1..1..1..1..0..0
..0..1..1..1..1..0..0..0....1..1..1..1..1..0..0..0....1..1..1..0..0..1..1..1
..0..0..1..1..0..0..0..0....1..1..1..1..1..0..0..0....1..1..0..0..0..0..1..1
..0..0..0..0..0..0..1..1....0..0..0..1..1..1..0..0....0..0..0..0..0..0..1..1
..1..1..1..0..0..1..1..1....0..0..0..0..1..1..1..1....0..0..0..0..0..1..1..1
..1..1..1..1..1..1..1..1....0..0..0..0..1..1..1..1....0..0..0..0..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2011
STATUS
approved