OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 98*a(n-1) - 2401*a(n-2) for n > 3.
Conjectures from Colin Barker, Jan 20 2019: (Start)
G.f.: 36*x*(3 + 92*x + 49*x^2) / (1 - 49*x)^2.
a(n) = 72 * 49^(n-2) * (120*n-47) for n>1.
(End)
EXAMPLE
Some solutions for n=2:
3 2 2 0 1 1 0 0 3 0 2 3 0 2 0 3 2 2 3 2
2 2 3 2 1 3 2 0 2 0 1 0 2 2 2 3 0 2 3 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 21 2016
STATUS
approved