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 A145577 #10 Dec 12 2023 08:22:11 %S A145577 0,5,7,6,2,4,3,8,1,0,5,7,6,2,4,3,8,1,0,5,7,6,2,4,3,8,1,0,5,7,6,2,4,3, %T A145577 8,1 %N A145577 A045944 mod 9. Period 9: repeat 0,5,7,6,2,4,3,8,1. %Y A145577 Essentially the same as A144478. %K A145577 nonn,easy %O A145577 0,2 %A A145577 _Paul Curtz_, Oct 13 2008