OFFSET
1,1
COMMENTS
Column 1 of A252433
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 11*a(n-3) -39*a(n-6) +57*a(n-9) -72*a(n-12) +60*a(n-15) -31*a(n-18) +17*a(n-21) -a(n-24) -a(n-27) for n>34
EXAMPLE
Some solutions for n=4
..1..2..3....2..3..2....3..2..2....0..0..2....2..0..2....2..0..2....1..3..3
..2..2..3....3..3..1....2..3..2....3..1..0....0..3..1....2..2..3....3..1..3
..0..1..3....3..2..2....0..3..1....2..2..3....3..2..2....1..3..0....1..1..2
..1..0..3....2..0..2....3..2..2....3..2..2....2..3..2....2..3..2....1..3..3
..0..0..2....3..3..1....2..3..2....0..1..3....0..3..1....2..2..3....3..1..0
..0..1..3....3..2..2....3..0..1....0..0..0....3..2..2....1..3..3....1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved