OFFSET
1,1
COMMENTS
Column 4 of A226717
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..111
EXAMPLE
Some solutions for n=3
.-1..0.-1..0....0..0..0.-1...-1..1.-1.-1....0.-1.-1..0...-1..0..1.-1
..1.-1..0..0....0..0..0.-1....0..0..0..1...-1..1..1..0....1..0.-1.-1
..0..1..0.-1...-1..0..0..0....1.-1.-1..1....1.-1.-1..0....0.-1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 15 2013
STATUS
approved