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 A001218 a(n) = 3^n mod 100. 4
 1, 3, 9, 27, 81, 43, 29, 87, 61, 83, 49, 47, 41, 23, 69, 7, 21, 63, 89, 67, 1, 3, 9, 27, 81, 43, 29, 87, 61, 83, 49, 47, 41, 23, 69, 7, 21, 63, 89, 67, 1, 3, 9, 27, 81, 43, 29, 87, 61, 83, 49, 47, 41, 23, 69, 7, 21, 63, 89, 67 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Period is 20. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 MATHEMATICA PowerMod[3, Range[0, 60], 100] (* Vincenzo Librandi, Aug 15 2016 PROG (PARI) a(n)=lift(Mod(3, 100)^n) \\ Charles R Greathouse IV, Dec 27 2012 (MAGMA) [Modexp(3, n, 100): n in [0..100]]; // Vincenzo Librandi, Aug 15 2016 CROSSREFS Cf. A001148, A216096, A216097. - Zak Seidov, Jul 27 2014 Sequence in context: A036142 A036160 A271352 * A036158 A036136 A271350 Adjacent sequences:  A001215 A001216 A001217 * A001219 A001220 A001221 KEYWORD nonn,easy AUTHOR EXTENSIONS Definition corrected by Zak Seidov, Jul 27 2014 STATUS approved

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Last modified August 17 17:05 EDT 2018. Contains 313816 sequences. (Running on oeis4.)