OFFSET
0,2
LINKS
Sean A. Irvine, Table of n, a(n) for n = 0..25
FORMULA
a(n) = A069554(3^n).
EXAMPLE
n=4: 3^4 = 81, a(4) = 2899999989 = 3*3*3*3*35802469, reverse(a(4)) = 2*3*3*3*3*61111111; gcd = 81 = 3^n.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Labos Elemer, Jun 04 2002
EXTENSIONS
a(15)-a(20) from Giovanni Resta, Oct 30 2019
STATUS
approved