OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..131
EXAMPLE
Some solutions for n=3:
..2..0..0..0....1..1..0..0....1..0..0..0....1..0..0..0....1..1..0..0
..1..1..0..0....2..1..1..0....2..1..0..0....1..1..0..0....3..1..1..0
..1..1..1..3....3..1..1..1....2..2..3..2....3..1..2..1....3..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 23 2012
STATUS
approved