OFFSET
1,1
COMMENTS
Diagonal of A242472.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..163
EXAMPLE
Some solutions for n=4
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....0....0....1....1....1....1....0....1....1....1....1....1....1
..0....2....0....1....1....1....2....2....2....1....0....2....1....1....0....2
..2....1....1....2....2....2....1....0....0....1....2....0....0....0....1....3
..2....1....0....0....2....0....0....0....1....2....1....0....0....0....2....2
..3....2....1....0....3....2....0....1....2....1....2....3....2....1....0....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 15 2014
STATUS
approved