OFFSET
1,2
COMMENTS
Diagonal of A196430.
EXAMPLE
Some solutions for n=3
..0..0..1....0..2..0....1..0..1....0..1..2....0..0..0....2..0..0....1..2..1
..0..0..1....0..4..2....1..0..1....0..1..1....3..2..0....1..0..0....0..4..0
..2..0..2....2..0..0....1..0..1....1..1..0....0..3..1....1..0..0....1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 02 2011
STATUS
approved