OFFSET
1,2
COMMENTS
Diagonal of A208408.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..13
EXAMPLE
Some solutions for n=4
..0..1..1..2....0..0..0..1....0..1..0..0....0..1..1..0....0..0..1..0
..0..1..0..0....0..1..1..0....2..0..3..0....0..0..2..0....2..0..1..2
..0..0..3..0....0..1..1..0....2..0..3..1....0..2..1..1....1..3..0..0
..1..1..2..0....0..0..0..1....1..2..0..2....3..1..0..0....1..3..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 26 2012
STATUS
approved