OFFSET
1,1
COMMENTS
Diagonal of A186568
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..26
EXAMPLE
Some solutions for 4X4
..0..0..0..0....0..0..0..0....2..1..1..2....0..1..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....1..2..1..1....0..0..1..0....1..0..0..0
..1..0..0..0....0..0..0..0....1..1..2..1....1..0..0..1....2..1..0..0
..2..0..0..0....1..1..1..1....2..1..1..2....0..1..0..0....1..2..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2011
STATUS
approved