OFFSET
1,2
COMMENTS
Column 2 of A221873
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) +27*a(n-2) -77*a(n-3) -247*a(n-4) +195*a(n-5) +277*a(n-6) -51*a(n-7) -32*a(n-8) +103*a(n-9) -78*a(n-10) +25*a(n-11) -4*a(n-12)
EXAMPLE
Some solutions for n=3
..2..0....2..0....1..1....1..1....1..1....1..1....0..1....0..0....1..0....0..1
..1..0....1..1....0..0....0..3....1..0....1..1....0..1....2..1....3..0....0..3
..1..2....0..2....2..2....1..0....2..1....1..1....3..1....2..1....1..1....1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2013
STATUS
approved