OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..51
EXAMPLE
Some solutions for n=5
..2....2...-1...-2...-2...-1...-1....1....1...-2....0...-1....2...-2....0....2
..0....0....0...-1....0....0....0...-2...-2...-1....0....2...-1....0...-2....0
..2...-2....2....0...-2...-2...-2....0....1...-2....0...-1....0...-1....0...-1
..0...-1...-1....2....1....0...-1....1....0....0....0...-2....1....2....1...-2
..2....2....2...-1....0....2....0....0....0...-1....1....0...-2...-1....0....0
..1...-1....0....0...-2....1....2...-1....2....2....2...-2....1....0....2....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 16 2012
STATUS
approved