OFFSET
1,1
COMMENTS
Diagonal of A186472
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..23
EXAMPLE
Some solutions for 3X3
..0..0..2....1..0..0....0..0..1....0..2..0....1..1..0....1..2..0....0..0..0
..0..0..2....2..0..0....0..0..1....2..0..2....2..0..1....0..0..2....2..0..0
..0..0..2....0..2..1....0..0..1....0..2..2....0..2..2....0..0..1....0..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 22 2011
STATUS
approved