OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
MATHEMATICA
Table[PowerMod[9, n, 5^n], {n, 0, 30}] (* Harvey P. Dale, Jul 17 2021 *)
PROG
(Magma) [9^n mod 5^n: n in [0..35]]; // Vincenzo Librandi, Jun 03 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 20 2008
STATUS
approved