OFFSET
1,1
COMMENTS
Diagonal of A186915
EXAMPLE
Some solutions for 4X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..4....0..0..3..5....0..0..3..6....0..1..2..4....0..1..1..3
..3..4..6..6....5..6..0..6....1..5..3..6....4..6..1..0....0..1..4..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2011
STATUS
approved