OFFSET
1,1
COMMENTS
Column 2 of A228977.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 13*a(n-1) -26*a(n-2) -122*a(n-3) +179*a(n-4) +248*a(n-5) -404*a(n-6) +135*a(n-7) +130*a(n-8) -374*a(n-9) +297*a(n-10) -120*a(n-11) +45*a(n-12).
EXAMPLE
Some solutions for n=4
..2..0....1..0....1..0....2..0....2..1....0..2....2..2....2..1....0..1....0..0
..1..1....1..1....2..0....2..0....1..2....2..2....1..1....1..0....0..1....2..2
..1..2....2..1....0..0....2..1....1..2....1..0....2..0....1..1....2..0....0..0
..0..2....0..2....2..2....1..1....2..2....0..2....2..0....1..0....2..2....1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 10 2013
STATUS
approved