OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..46
EXAMPLE
Some solutions for n=5
.-3...-3....3...-1...-1....3...-3....3....0...-1....0...-1...-1...-1....2...-2
.-3....2....1...-2...-2....0....0...-2....1...-3...-1...-2....3...-1...-3...-1
.-3...-3...-2....1....3...-1....3....3....2...-2....0...-3...-1...-1....1...-2
.-1...-1....1....2....3....0....0....3....1....0...-2...-1...-1...-1...-3....0
.-3....1...-2...-1....3....3...-3...-2....2...-1...-1...-2....3....0....2...-1
.-3...-1....1...-2....3....0....2...-2....2...-3....0...-3....3...-1...-1...-3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2012
STATUS
approved