OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..33
EXAMPLE
Some solutions for n=5
..2...-2...-2...-1...-2...-1...-2....2...-1....0....1...-2....2....2....0....0
.-1...-2....1....1....2...-1...-1....1....2...-2...-2...-2...-1....0...-1...-1
..1....0...-1....2...-2....1...-2...-2....1...-2...-2...-2....2...-2....2...-2
..2...-1...-1...-1....0...-2...-2....1....0....0....1...-1....2...-1....2...-1
..2...-1...-1....1...-2...-1....1....2...-1...-1...-2....0....2...-2....1....2
.-1...-2...-1....2...-2...-2....2....2....0...-1....0...-2....2...-1....2...-1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 16 2012
STATUS
approved