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 A143759 #11 Oct 16 2023 11:27:27 %S A143759 86,46,26,16,15,9,4,3,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A143759 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 A143759 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 A143759 Aliquot sequence starting at 86. %F A143759 a(n+1) = A001065(a(n)). - _R. J. Mathar_, Oct 11 2017 %t A143759 NestList[If[#>0,DivisorSigma[1, #]-#,0]&,86,100] (* _Paolo Xausa_, Oct 16 2023 *) %Y A143759 Cf. A001065. %K A143759 nonn,easy %O A143759 0,1 %A A143759 _N. J. A. Sloane_, Nov 30 2008