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 A300290 #17 Oct 13 2022 13:52:38 %S A300290 0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2, %T A300290 3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1, %U A300290 2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3,0,1,2,2,3,3 %N A300290 Period 6: repeat [0, 1, 2, 2, 3, 3]. %C A300290 Underlying A300068(n+2), n >= 0. %H A300290 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,1). %F A300290 a(n) = n (mod 6) - floor((n (mod 6))/3) - floor((n (mod 6))/5), n >= 0. %F A300290 G.f.: x*(1 + x*(2 + 3*x^2)*(1 + x))/(1 - x^6). %F A300290 a(n) = (11 - 5*cos(n*Pi/3) - 5*cos(2*n*Pi/3) - cos(n*Pi) - 3*sqrt(3)*sin(n*Pi/3) - sqrt(3)*sin(2*n*Pi/3))/6. - _Wesley Ivan Hurt_, Oct 04 2018 %Y A300290 Cf. A300067, A300069, A300068, A300075. %K A300290 nonn,easy %O A300290 0,3 %A A300290 _Wolfdieter Lang_, Mar 03 2018