OFFSET
1,1
COMMENTS
Column 4 of A214112
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 68*a(n-1) -66*a(n-2).
Empirical: G.f. -10*x*(-1+x) / ( 1-68*x+66*x^2 ). - R. J. Mathar, Jul 04 2012
EXAMPLE
Some solutions for n=4
..0..1..2..3..1....0..1..0..1..2....0..1..0..1..2....0..1..0..2..3
..3..2..0..1..2....1..0..1..0..3....2..3..1..2..0....1..2..1..3..0
..1..3..1..2..0....2..1..3..2..1....1..0..2..0..2....3..1..3..1..2
..0..1..0..3..1....3..0..1..0..2....2..1..3..1..0....0..3..1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 04 2012
STATUS
approved