OFFSET
1,1
COMMENTS
Column 4 of A268009.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..17
EXAMPLE
Some solutions for n=2
..0..1..0..0....0..1..2..2....0..1..2..0....0..0..1..2....0..1..0..2
..2..3..3..0....3..0..0..1....0..1..1..3....3..4..3..3....3..0..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 24 2016
STATUS
approved