OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..37
EXAMPLE
Some solutions for n=5
..3...-2...-2....2...-2...-3...-2...-1....1....2....3...-3....0...-3...-1....0
.-2....1...-1....0...-1...-2....1...-2....2...-3....2....2....1...-1....0....1
..3....2....3....2...-3...-1...-2...-1....1...-2....1...-1....2....0...-1....3
..0...-1....2....0...-1...-2....3....3....2....3....2...-3....3...-1...-2....2
.-3...-2...-1....3...-3...-3...-2...-2....0....2....1...-1...-2....0...-1....3
.-2....3....2...-2...-2...-2....3...-1....2....3....2....2...-3...-2....2....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2012
STATUS
approved