OFFSET
1,1
COMMENTS
Row 3 of A252305
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-3) -14*a(n-6) +8*a(n-9) for n>15
EXAMPLE
Some solutions for n=4
..2..3..1..2..0..1....2..0..1..2..3..1....0..1..2..3..1..2....3..3..1..2..0..1
..0..0..0..3..3..0....0..0..0..0..3..0....0..0..0..3..0..0....2..1..0..2..1..0
..3..2..1..0..2..1....3..2..1..0..2..1....2..1..0..2..1..0....0..0..3..0..3..3
..2..0..1..2..3..1....2..3..1..2..3..1....3..1..2..3..1..2....2..3..1..2..0..1
..3..3..0..0..3..3....0..3..0..0..0..0....3..0..0..3..0..3....2..1..0..2..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved