OFFSET
1,1
COMMENTS
Column 4 of A226398
EXAMPLE
Some solutions for n=3
.-4....2...-3...-4...-3...-3...-4....1...-2....1...-3....0....0...-1...-3...-2
.-3....3...-2....0...-2....2...-1....4...-2....1....4....1....3...-1...-3...-1
.-3....3....3....3....0....2....2....4....1....1....4....1....3...-1...-2....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 06 2013
STATUS
approved