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 A144408 #10 Dec 12 2023 08:29:23 %S A144408 0,1,5,9,0,2,6,9,9,1,6,0,0,1,5,9,0,2,6,9,9,1,6,0,0,1,5,9,0,2,6,9,9,1, %T A144408 6,0,0,1,5,9,0,2,6,9,9,1,6,0,0,1,5,9,0,2,6,9,9,1,6,0,0,1,5,9,0,2,6,9, %U A144408 9,1,6,0,0,1,5,9,0,2,6,9,9,1,6,0,0,1,5,9,0,2,6,9,9,1,6,0,0,1,5,9,0,2 %N A144408 Last digit of A135266(n). %F A144408 Period 12: a(n+12)=a(n). %F A144408 Sums of periodic trisections: a(3n)+a(3n+3)+a(3n+6)+a(3n+9) = a(3n+1)+a(3n+4)+a(3n+7)+a(3n+10) = a(3n+2)+a(3n+5)+a(3n+8)+a(3n+11) = 16. %F A144408 G.f.: x(6x^7-5x^6+8x^5+6x^4-8x^3+4x^2+4x+1)/((1-x)(1+x)(x^2+1)(x^2-x+1)(x^4-x^2+1)). - _R. J. Mathar_, Dec 02 2008 %K A144408 nonn,base %O A144408 0,3 %A A144408 _Paul Curtz_, Sep 30 2008 %E A144408 Edited by _R. J. Mathar_, Dec 02 2008