OFFSET
1,1
COMMENTS
Column 7 of A207050
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-3) for n>15
EXAMPLE
Some solutions for n=4
..0..0..1..1..0..2..2..2....0..0..2..1..1..1..1..1....0..2..1..1..0..2..2..1
..0..1..1..1..2..2..2..0....0..0..1..1..1..2..2..1....0..1..1..1..2..2..2..1
..1..1..1..2..2..2..0..0....0..1..1..1..2..2..2..1....1..1..1..2..2..2..0..0
..1..1..2..2..2..0..0..0....1..1..1..2..2..2..0..0....1..1..2..2..2..0..0..0
..1..2..2..2..0..0..0..1....1..1..2..2..2..0..0..0....1..2..2..2..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved