OFFSET
1,2
COMMENTS
Column 2 of A208993.
EXAMPLE
Some solutions for n=6:
.-1...-2...-1...-1...-2...-2...-1...-1...-2...-2...-2...-1...-2...-1...-1...-2
..0....0...-1....1....0....0....0....0....0....0...-2...-1....0...-1....0....0
..0....2...-1....0....2....1...-1....1....0....2....0....1....1....1....1....1
..1....1....0....0....0....2....1...-1....2....0....2...-1....1....0....0....0
..0....0....2....0....1....0....0....1....1....0....2....1....0....1....0....1
..0...-1....1....0...-1...-1....1....0...-1....0....0....1....0....0....0....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2012
STATUS
approved