OFFSET
1,1
COMMENTS
Diagonal of A181217
LINKS
R. H. Hardin, Table of n, a(n) for n=1..20
EXAMPLE
Some avoided solutions for 4X4
..1..0..0..0....0..0..0..0....0..0..0..1....0..1..0..0....0..0..1..0
..0..1..0..0....0..0..1..1....0..1..1..0....0..0..1..0....0..1..0..0
..0..0..1..1....0..0..1..0....0..1..0..0....1..0..0..1....1..0..0..0
..0..0..0..0....0..1..0..0....0..0..0..0....0..0..0..0....0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved