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A070358
a(n) = 3^n mod 32.
1
1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25, 11, 1, 3, 9, 27, 17, 19, 25
OFFSET
0,2
FORMULA
From R. J. Mathar, Apr 20 2010: (Start)
a(n) = a(n-8).
G.f.: ( -1-3*x-9*x^2-27*x^3-17*x^4-19*x^5-25*x^6-11*x^7 ) / ( (x-1)*(1+x)*(x^2+1)*(x^4+1) ). (End)
MATHEMATICA
PowerMod[3, Range[0, 50], 32] (* or *) Table[Mod[3^n, 32], {n, 0, 100}] (* G. C. Greubel, Mar 09 2016 *)
PROG
(PARI) a(n)=lift(Mod(3, 32)^n) \\ Charles R Greathouse IV, Mar 22 2016
CROSSREFS
Cf. A000244.
Sequence in context: A271015 A131997 A122842 * A321542 A321540 A036123
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 12 2002
STATUS
approved