OFFSET
1,2
COMMENTS
Column 7 of A263939.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..53
EXAMPLE
Some solutions for n=7
..0....2....0....0....0....1....1....1....0....1....0....1....0....0....0....0
..2....1....1....1....1....0....0....0....3....0....2....2....1....2....4....1
..3....0....2....2....2....2....2....3....1....2....3....0....2....1....2....3
..1....4....4....3....4....5....3....2....2....3....1....3....6....3....3....4
..4....3....6....6....3....3....5....4....4....6....5....4....4....4....1....2
..6....5....5....4....5....4....4....6....5....5....4....5....5....5....5....5
..5....6....3....5....6....6....6....5....6....4....6....6....3....6....6....6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 30 2015
STATUS
approved