OFFSET
1,2
COMMENTS
Column 7 of A188236
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..25
EXAMPLE
Some solutions for n=4
.-8...-6...-8...-9...-6...-4...-8...-8...-5...-6...-7...-4...-6...-8...-4...-7
..2...-2...-5...-1...-1...-4...-2....0...-3...-5...-4...-2....0...-6...-3...-5
..3....4....5....4...-1....3....2....2....4....4....5...-1....1....5....1....6
..3....4....8....6....8....5....8....6....4....7....6....7....5....9....6....6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 24 2011
STATUS
approved