OFFSET
1,2
COMMENTS
Diagonal of A183584
EXAMPLE
Some solutions with a(1,1)<=1 for 3X3
..0..3..3....0..0..3....1..1..3....1..1..0....1..3..0....1..2..2....1..1..1
..0..3..0....0..3..3....1..1..3....1..0..0....1..3..0....1..1..1....1..1..1
..0..3..0....0..0..3....3..3..3....1..0..0....1..3..0....3..3..3....1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2011
STATUS
approved