OFFSET
1,2
COMMENTS
Column 2 of A211849
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....1....1....0....1....0....1....1....1....1....0....1
..0....1....1....1....1....1....1....1....1....0....1....1....1....1....1....1
..0....2....2....1....2....2....2....1....2....1....1....2....1....2....1....2
..2....1....2....2....2....2....2....1....2....1....2....2....1....2....2....1
..0....2....2....2....3....3....3....2....3....2....1....3....2....3....2....1
..0....2....2....3....3....2....3....2....2....2....1....3....2....3....3....3
..3....3....3....3....1....3....3....3....2....3....3....2....3....0....2....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 22 2012
STATUS
approved