OFFSET
1,1
COMMENTS
Column 2 of A252015
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-3) +a(n-5) -22*a(n-6) -9*a(n-8) +6*a(n-9) +23*a(n-11) +23*a(n-12) -15*a(n-14) -15*a(n-15) for n>22
EXAMPLE
Some solutions for n=4
..0..0..3..3....0..3..0..3....1..0..2..1....2..1..3..2....0..2..1..0
..0..1..2..3....3..2..1..0....2..2..2..2....1..1..1..1....2..2..2..2
..3..2..1..0....0..1..2..3....0..1..2..0....3..1..2..3....1..2..3..1
..0..0..3..3....3..3..0..0....1..0..2..1....2..1..3..2....0..2..1..0
..3..1..2..0....0..2..1..3....2..2..2..2....1..1..1..1....2..2..2..2
..0..0..3..3....0..3..0..3....3..1..2..0....3..1..2..0....1..2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 12 2014
STATUS
approved