OFFSET
1,2
COMMENTS
Column 8 of A187988
EXAMPLE
Some solutions for n=3
.-1...-7...-4...-7...-8...-3...-3...-5...-6...-6...-8...-5...-4...-2...-9...-1
..0....6...-4...-7...-8...-3....2...-5...-6....5....7....4....3...-2....8...-1
..0....6....5....8....9....4....2....6....7....5....7....4....3....3....8....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 18 2011
EXTENSIONS
Terms beyond a(11) from R. J. Mathar, May 17 2023
STATUS
approved