OFFSET
1,2
COMMENTS
Diagonal of A203550.
EXAMPLE
Some solutions for n=5
..3..0..1..3..2....1..4..2..2..3....1..0..4..0..3....0..1..3..4..4
..3..2..1..3..4....0..4..3..1..4....1..0..4..0..3....2..0..1..1..4
..3..1..4..2..4....1..4..3..3..4....3..2..4..3..3....2..2..3..4..0
..3..4..4..4..4....3..4..2..4..4....4..3..4..2..3....1..2..3..4..2
..4..4..4..3..4....3..4..4..3..4....4..4..4..4..0....4..4..4..4..4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 2012
STATUS
approved