OFFSET
1,1
COMMENTS
Diagonal of A184505
EXAMPLE
Some solutions with a(1,1)=0 for 4X4
..0..1..1..1....0..2..0..2....0..2..1..0....0..0..1..1....0..0..1..1
..2..2..2..0....0..0..1..0....2..1..2..2....0..0..1..1....1..0..2..1
..1..2..2..2....0..2..2..2....1..2..2..1....0..1..2..0....0..0..1..1
..1..1..0..0....0..2..0..2....2..0..1..2....1..1..1..0....0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 16 2011
STATUS
approved