OFFSET
1,1
COMMENTS
Column 7 of A226717
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
Some solutions for n=3
.-1.-1..1.-1..0..1.-1...-1.-1..1.-1..0..1..0...-1.-1..1.-1.-1..0..1
.-1..1.-1.-1..0..1.-1...-1..1.-1..0.-1..1..1....0..0..0..0..1..0.-1
..0..0.-1..1..0..0..1....1.-1.-1..1..1.-1.-1....1..0..0..1.-1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 15 2013
STATUS
approved