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A139730
a(n) = 9^n mod 5^n.
1
0, 4, 6, 104, 311, 2799, 191, 17344, 77971, 701739, 456276, 33403359, 202973981, 361922079, 815892461, 19550063399, 145432992466, 88193807194, 1556683717871, 10195456195214, 34538646772551, 120112957671709, 2034690935451631, 1622917881955304, 50369047802832111
OFFSET
0,2
LINKS
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
Sequence in context: A052684 A213128 A105037 * A367880 A013023 A012909
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 20 2008
STATUS
approved