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 A144483 #10 Dec 12 2023 08:24:22 %S A144483 5,0,6,5,6,0,5,3,3,5,0,6,5,6,0,5,3,3,5,0,6,5,6,0,5,3,3,5,0,6,5,6,0,5, %T A144483 3,3,5,0,6,5,6,0,5,3,3,5,0,6,5,6,0,5,3,3 %N A144483 A144481(4n-3). %F A144483 Period 9: a(n+9)=a(n). %Y A144483 Cf. A078371. %K A144483 nonn %O A144483 1,1 %A A144483 _Paul Curtz_, Oct 12 2008 %E A144483 Edited by _R. J. Mathar_, Dec 08 2008