OFFSET
1,1
COMMENTS
Column 1 of A204630
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1)
EXAMPLE
Some solutions for n=3
..0..0....0..0....0..0....0..0....0..1....0..0....0..0....0..0....0..0....0..1
..0..1....1..2....0..1....0..1....2..1....1..1....0..1....0..1....0..1....1..1
..2..2....0..2....0..1....1..2....2..0....2..0....1..1....0..0....2..1....1..2
..0..2....2..1....0..1....2..2....0..1....0..1....1..2....2..1....0..2....1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2012
STATUS
approved