OFFSET
1,1
COMMENTS
Column 4 of A237904
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..55
EXAMPLE
Some solutions for n=1
..1..1..2..1..2....2..2..1..0..1....1..1..2..3..0....3..0..3..2..1
..0..3..3..1..2....3..1..2..2..3....3..3..2..0..3....3..0..2..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 15 2014
STATUS
approved