OFFSET
1,2
COMMENTS
Column 2 of A221432
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..26
FORMULA
Empirical: a(n) = 13*a(n-1) -13*a(n-2) -151*a(n-3) +286*a(n-4) -287*a(n-5) +833*a(n-6) -966*a(n-7) +488*a(n-8) +39*a(n-9) -63*a(n-10) +26*a(n-11) -2*a(n-12)
EXAMPLE
Some solutions for n=3
..2..1....0..2....1..0....0..1....2..2....0..2....1..0....1..1....0..1....2..0
..1..0....0..2....1..1....3..0....1..1....4..0....2..0....3..0....5..0....2..1
..2..0....2..0....2..1....0..2....0..0....0..0....0..3....1..0....0..0....1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 16 2013
STATUS
approved