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 A070344 #34 Dec 18 2023 14:29:00 %S A070344 1,3,9,27,23,11,4,12,7,21,5,15,16,19,28,26,20,2,6,18,25,17,22,8,24,14, %T A070344 13,10,1,3,9,27,23,11,4,12,7,21,5,15,16,19,28,26,20,2,6,18,25,17,22,8, %U A070344 24,14,13,10,1,3,9,27,23,11,4,12,7,21,5,15,16,19,28 %N A070344 a(n) = 3^n mod 29. %H A070344 G. C. Greubel, <a href="/A070344/b070344.txt">Table of n, a(n) for n = 0..1000</a> %H A070344 <a href="/index/Rec#order_15">Index entries for linear recurrences with constant coefficients</a>, signature (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1). %F A070344 a(n) = a(n-28). - _G. C. Greubel_, Mar 12 2016 %t A070344 PowerMod[3, Range[0, 50], 29] (* _G. C. Greubel_, Mar 12 2016 *) %o A070344 (Sage) [power_mod(3,n,29)for n in range(0, 71)] # _Zerinvary Lajos_, Nov 25 2009 %o A070344 (PARI) a(n)=lift(Mod(3,29)^n) \\ _Charles R Greathouse IV_, Mar 22 2016 %K A070344 nonn,easy %O A070344 0,2 %A A070344 _N. J. A. Sloane_, May 12 2002