OFFSET
1,1
COMMENTS
Column 4 of A231441
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=5
..0..0..0..0..0..0....0..0..1..1..1..1....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..1..1..1..1....0..0..0..0..0..0....0..0..1..1..0..0
..1..1..1..1..1..1....0..0..0..1..1..1....0..0..0..0..0..0....1..1..1..1..1..1
..1..1..1..1..1..1....0..0..0..2..2..2....1..1..1..1..1..1....1..1..1..1..1..1
..2..2..1..1..3..3....0..0..2..2..2..2....1..1..1..1..1..1....1..1..1..2..2..2
..2..2..2..3..3..3....2..2..2..2..2..2....2..2..1..1..2..2....2..2..2..2..2..2
..2..2..2..3..3..3....2..2..2..2..2..2....2..2..2..2..2..2....2..2..2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 09 2013
STATUS
approved