This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A271351 #21 Sep 08 2022 08:46:16 %S A271351 1,3,9,27,81,112,74,91,11,33,99,35,105,53,28,84,121,101,41,123,107,59, %T A271351 46,7,21,63,58,43,129,125,113,77,100,38,114,80,109,65,64,61,52,25,75, %U A271351 94,20,60,49,16,48,13,39,117,89,5,15,45,4,12,36,108,62,55,34,102,44,1 %N A271351 a(n) = 3^n mod 131. %H A271351 Vincenzo Librandi, <a href="/A271351/b271351.txt">Table of n, a(n) for n = 0..1000</a> %F A271351 a(n) = a(n-65). %t A271351 PowerMod[3, Range[0, 100], 131] %o A271351 (Magma) [Modexp(3, n, 131): n in [0..100]]; %o A271351 (PARI) a(n) = lift(Mod(3, 131)^n); \\ _Altug Alkan_, Apr 05 2016 %Y A271351 Cf. similar sequences listed in A271350. %K A271351 nonn,easy %O A271351 0,2 %A A271351 _Vincenzo Librandi_, Apr 05 2016