OFFSET
1,2
COMMENTS
Column 7 of A183927
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..63
EXAMPLE
Some solutions for n=4
.-3...-5...-5...-3...-6...-6...-3...-5...-2...-6...-6...-4...-4...-3...-2...-2
..1...-2...-1...-1....2....0...-3...-1...-1...-1....1...-3...-2...-1...-1...-2
..1....2....0....0....2....3....0....1....0....2....1....0...-1....2....1...-1
..1....5....6....4....2....3....6....5....3....5....4....7....7....2....2....5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2011
STATUS
approved