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 A143756 #5 Oct 11 2017 06:42:23 %S A143756 81,40,50,43,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A143756 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %U A143756 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 %N A143756 Aliquot sequence starting at 81. %F A143756 a(n+1) = A001065(a(n)). - _R. J. Mathar_, Oct 11 2017 %K A143756 nonn,easy %O A143756 0,1 %A A143756 _N. J. A. Sloane_, Nov 30 2008