OFFSET
1,7
COMMENTS
Column 4 of A216645
EXAMPLE
All solutions for n=9
..3....1....1....1....1
..3....3....2....1....1
..4....3....3....2....1
..5....5....4....2....2
..6....6....5....4....5
..7....6....6....5....7
..7....6....7....6....8
..8....8....8....9....8
..8....9....9....9....8
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 11 2012
STATUS
approved