OFFSET
1,4
COMMENTS
Column 3 of A263764
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=7
..2....2....2....3....3....3....3....0....3....2....0....2....0....1....3....0
..0....0....1....0....0....2....4....2....2....0....3....1....1....0....4....3
..1....3....5....4....2....0....0....5....0....5....2....0....5....2....0....5
..5....1....0....6....1....6....6....1....1....1....1....3....3....3....1....1
..3....6....3....1....4....1....1....3....6....4....6....6....2....6....2....2
..6....4....4....2....5....4....2....4....4....3....4....4....4....4....6....4
..4....5....6....5....6....5....5....6....5....6....5....5....6....5....5....6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 25 2015
STATUS
approved