OFFSET
1,2
COMMENTS
Column 4 of A209073.
EXAMPLE
Some solutions for n=6:
.-3...-2...-3...-4...-3...-4...-1...-2...-3...-3...-4...-3...-4...-4...-2...-1
..3...-2....3....3....4...-3...-1....0....2...-1...-2....4...-2...-1...-1...-1
.-1...-2....1...-1...-2....2...-1...-2....3....0....2...-1....3....2...-1....2
.-3....3...-2....4....3....1...-1....0...-2...-1....3....0....3....2....4....0
..4....0....3....1...-2....0....4....1....2....2....3...-2...-4....4...-2....0
..0....3...-2...-3....0....4....0....3...-2....3...-2....2....4...-3....2....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2012
STATUS
approved