OFFSET
1,1
COMMENTS
Column 2 of A208353
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) -9*a(n-2) for n>4
EXAMPLE
Some solutions for n=4
..0..0....0..1....0..0....0..0....0..0....0..0....0..1....0..0....0..0....0..0
..0..0....1..0....0..0....0..0....1..0....1..1....1..2....0..0....0..0....1..0
..1..1....0..1....1..2....1..1....1..1....1..1....0..1....1..1....1..2....1..1
..2..2....1..2....3..2....1..1....1..0....0..0....0..0....1..2....1..3....1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 25 2012
STATUS
approved