OFFSET
1,4
COMMENTS
Column 1 of A201847
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=9
..0....0...-1....0....0....1....1....0....0....0...-1....0....1....0....1....0
..0....0...-1....0....0....1....1....0....0....0...-1....0....1....0....1....0
..0....0...-1....0...-1...-1....1....0....0....0...-1...-1....0....1....0....0
..1....0....0....1...-1...-1...-1...-1....1...-1....1...-1....0....1....0...-1
..1....0....0....1....0....0...-1...-1....1...-1....1....1....0...-1...-1...-1
..1...-1....0....0....0....0...-1....1...-1...-1....1....1....0...-1...-1....0
.-1...-1....1....0....0....0....0....1...-1....1....0....0....0....0....0....0
.-1....1....1...-1....1....0....0....0....0....1....0....0...-1....0....0....1
.-1....1....1...-1....1....0....0....0....0....1....0....0...-1....0....0....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2011
STATUS
approved