OFFSET
0,2
LINKS
FORMULA
a(n)= A067410(n+7, 7). a(n)= 9*16^(n-1), n>=1, a(0)=1.
G.f.: (1-7*x)/(1-16*x).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Jan 25 2002
STATUS
approved