OFFSET
1,1
COMMENTS
Column 2 of A252243
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 118*a(n-3) -4264*a(n-6) +55168*a(n-9) -225280*a(n-12) +262144*a(n-15) for n>16
EXAMPLE
Some solutions for n=4
..2..1..2..2....0..0..2..0....2..2..1..2....0..1..1..0....1..1..3..1
..0..2..0..0....1..1..3..1....0..3..2..3....0..1..1..0....3..0..2..0
..3..2..0..0....1..1..0..1....0..0..2..0....2..0..0..2....1..1..3..1
..2..1..2..2....3..3..2..0....2..2..1..2....3..1..1..0....1..1..3..1
..3..2..0..0....1..1..0..1....0..3..2..0....3..1..1..0....0..0..2..0
..0..2..3..3....1..1..3..1....3..0..2..0....2..0..0..2....1..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 15 2014
STATUS
approved