OFFSET
1,2
COMMENTS
Column 6 of A188236
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..27
EXAMPLE
Some solutions for n=4
.-7...-3...-4...-6...-5...-7...-3...-4...-8...-8...-3...-6...-7...-8...-8...-6
.-5...-1...-2...-2...-5....1...-3...-4...-3...-3...-2....0...-4...-5...-6...-5
..5....1....1....1....4....2....1....0....3....5....2....0....4....6....7....4
..7....3....5....7....6....4....5....8....8....6....3....6....7....7....7....7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 24 2011
STATUS
approved