OFFSET
1,2
COMMENTS
Column 8 of A183935
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..59
EXAMPLE
Some solutions for n=4
.-5...-3...-3...-8...-7...-6...-4...-2...-6...-7...-5...-7...-4...-3...-6...-5
..0....0...-2....1...-1...-1...-3...-2...-1....1....0...-2...-4...-1....0...-1
..0....1....2....3....4....0....1....1....2....2....2....4....2...-1....2....1
..5....2....3....4....4....7....6....3....5....4....3....5....6....5....4....5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2011
STATUS
approved