OFFSET
1,2
COMMENTS
Column 4 of A263939.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=7
..2....0....0....2....1....0....1....1....0....0....0....0....0....1....2....0
..1....1....1....0....2....2....0....3....1....1....1....2....4....0....1....1
..0....2....2....1....3....3....2....0....4....2....3....1....2....2....3....5
..3....3....6....3....0....1....5....2....2....5....2....3....3....4....0....2
..4....4....3....5....4....5....4....4....3....4....5....6....1....5....4....3
..6....6....4....4....5....4....3....5....6....3....4....5....5....3....5....4
..5....5....5....6....6....6....6....6....5....6....6....4....6....6....6....6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 30 2015
STATUS
approved