OFFSET
1,1
COMMENTS
Column 4 of A220931
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3
..1..1..0..0....1..1..2..2....1..1..1..2....0..0..1..2....0..0..0..2
..1..0..0..0....1..1..2..1....1..1..1..2....0..0..2..1....0..0..2..0
..1..0..0..2....1..3..1..1....1..1..3..3....0..0..1..1....1..3..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 25 2012
STATUS
approved