OFFSET
1,1
COMMENTS
Column 2 of A209960
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 24*a(n-1) -23*a(n-2) -678*a(n-3) -472*a(n-4) +1196*a(n-5) +448*a(n-6) -416*a(n-7)
EXAMPLE
Some solutions for n=4
..1..1..2....2..0..1....1..2..1....1..2..0....2..2..2....0..0..2....2..0..1
..1..1..2....2..0..2....1..1..1....1..2..1....1..1..0....0..0..0....0..0..0
..1..1..1....1..0..2....1..0..1....2..2..0....2..2..0....0..1..1....2..2..1
..0..1..2....1..2..1....2..2..2....0..0..0....1..0..1....0..0..1....2..0..0
..2..1..2....2..2..1....0..1..2....2..0..0....2..0..2....0..2..2....2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2012
STATUS
approved