OFFSET
1,1
COMMENTS
Row 2 of A252305
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 11*a(n-3) -42*a(n-6) +64*a(n-9) -32*a(n-12) for n>21
EXAMPLE
Some solutions for n=4
..1..1..1..1..1..1....3..3..0..3..3..1....0..3..3..0..3..3....2..0..1..2..3..1
..2..0..1..2..0..1....3..2..2..3..2..2....1..0..2..1..0..2....3..0..0..0..0..0
..1..3..2..1..3..2....2..3..2..2..3..1....1..2..0..1..2..3....3..2..1..3..2..1
..1..1..1..1..1..1....3..3..0..3..3..1....0..3..3..0..3..3....2..3..1..2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved