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A070356
a(n) = 3^n mod 23.
3
1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8, 1, 3, 9, 4, 12, 13, 16, 2, 6, 18, 8
OFFSET
0,2
FORMULA
a(n) = a(n-11). - Vincenzo Librandi, Feb 06 2011
MATHEMATICA
PowerMod[3, Range[0, 50], 23] (* or *) Table[Mod[3^n, 23], {n, 0, 100}] (* G. C. Greubel, Mar 09 2016 *)
PROG
(Sage) [power_mod(3, n, 23)for n in range(0, 88)] # Zerinvary Lajos, Nov 25 2009
(PARI) a(n)=lift(Mod(3, 23)^n) \\ Charles R Greathouse IV, Mar 22 2016
CROSSREFS
Cf. A000244.
Sequence in context: A199452 A249414 A011428 * A143237 A180485 A370464
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 12 2002
STATUS
approved