OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..41
EXAMPLE
Some solutions for n=5
..2....3...-2....0....0....2...-2...-3...-1....3....2...-3...-3...-3...-3...-3
..3....1....1....2....1...-1...-3....1....0...-1....0...-1....2....1....2...-1
..0....2....0....3....3...-2....2...-3...-2....3....3...-3...-3...-3....1...-3
..3....0...-1....2....1....1....1....2....0....1....0...-2....0....1...-3...-1
..2....1....2....1....2...-2....2...-3...-2....3...-3....0...-3....2....2....2
..3....0....3....0....1....1....1....2....0....1....0...-2....2....3...-3....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2012
STATUS
approved