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 A110270 #24 Sep 08 2022 08:45:19
%S A110270 0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,
%T A110270 0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,
%U A110270 0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0,0,0,2,0,1,0
%N A110270 a(n) = (n mod 2)*(n mod 3).
%C A110270 Period 6: repeat [0, 1, 0, 0, 0, 2]. - _Joerg Arndt_, Aug 17 2014
%C A110270 Least positive integer k such that n^k == 1 (mod 6), or 0 if GCD(n,6) > 1. - _Bruno Berselli_, Mar 22 2016
%H A110270 Colin Barker, <a href="/A110270/b110270.txt">Table of n, a(n) for n = 0..1000</a>
%H A110270 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,1).
%F A110270 a(n) = A000035(n) * A010872(n).
%F A110270 a(n) = n mod (2 + n mod 2). - _Wesley Ivan Hurt_, Aug 16 2014
%F A110270 a(n) = a(n-6) for n>5. G.f.: x*(1+2*x^4) / ((1-x)*(1+x)*(1-x+x^2)*(1+x+x^2)). - _Colin Barker_, Mar 22 2016
%F A110270 a(n) = ( 6*sin(n*Pi/3) - sqrt(3) )*( sin(n*Pi/3) + sin(2*n*Pi/3) )/6. - _Wesley Ivan Hurt_, Jun 23 2016
%p A110270 A110270:=n->(n mod 2)*(n mod 3): seq(A110270(n), n=0..100); # _Wesley Ivan Hurt_, Aug 16 2014
%t A110270 Table[Mod[n,2]Mod[n,3],{n,0,110}] (* or *) PadRight[{},110,{0,1,0,0,0,2}] (* _Harvey P. Dale_, Oct 01 2013 *)
%o A110270 (PARI) a(n) = (n % 2) * (n % 3); \\ _Michel Marcus_, Aug 17 2014
%o A110270 (Magma) &cat [[0,1,0,0,0,2]^^20]; // _Bruno Berselli_, Mar 22 2016
%o A110270 (PARI) concat(0, Vec(x*(1+2*x^4)/((1-x)*(1+x)*(1-x+x^2)*(1+x+x^2)) + O(x^50))) \\ _Colin Barker_, Mar 22 2016
%Y A110270 Cf. A000035, A010872, A110269.
%K A110270 nonn,easy
%O A110270 0,6
%A A110270 _Reinhard Zumkeller_, Jul 18 2005