OFFSET
1,1
COMMENTS
Column 3 of A223999
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) -24*a(n-2) -2*a(n-3) +30*a(n-4) +96*a(n-5) -150*a(n-6) -108*a(n-7) +48*a(n-8) +270*a(n-9)
EXAMPLE
Some solutions for n=3
..2..2..2....1..1..2....0..0..0....0..0..2....0..1..1....0..0..0....0..1..1
..2..2..2....1..1..2....0..0..2....1..2..2....1..2..2....0..0..1....0..0..2
..0..2..2....0..2..2....1..1..2....0..1..2....1..2..2....1..1..2....0..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved