OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..27
EXAMPLE
Some solutions for n=5
..3....3....2...-3....0....2....2...-3....0...-1...-3....1...-2....3...-1...-3
..0....2....0...-3...-1....3....2....3...-3....1....1....2...-2....2....2...-3
.-3....0...-2...-3....1...-1....2...-1...-2....0...-2....2...-3...-1....2...-1
..0....3....0....1....0....3...-2....1....3....1....1...-1...-1....2....3....1
.-2....1...-2....0....0....3....2...-1....2....3...-1....2....0....3....2...-3
..0....2....2...-1....1....0...-3...-3...-1....2....3....0...-1...-1....1...-3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2012
STATUS
approved