OFFSET
1,1
COMMENTS
Diagonal of A188992
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..18
EXAMPLE
Some solutions for 3X3
..1..0..1....0..1..1....1..0..0....1..1..1....1..0..1....0..1..1....0..1..1
..1..0..1....1..1..0....1..1..0....1..0..1....0..1..0....0..1..1....0..0..0
..0..1..0....0..1..1....1..0..0....0..1..0....1..0..1....1..1..0....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 15 2011
STATUS
approved