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 A087655 #7 Jul 22 2025 05:54:19
%S A087655 1,1,1,3,7,9,5,3,13,13,5,7,13,19,7,15,15,7,13,25,25,15,5,27,39,39,15,
%T A087655 23,41,17,35,21,23,19,41,35,11,17,41,47,37,15,35,59,49,19,31,57,27,23,
%U A087655 59,85,47,47,23,49,35,59,41,53,29,61,33,77,31,69,49,25,85,81,51,51,33,47
%N A087655 a[n] = a[abs[n - a[n-1]]] + a[abs[n - a[n-2]]]+ a[abs[n - a[n-3]]].
%t A087655 Rauzy[n_Integer?Positive] := Rauzy[n] =Rauzy[Abs[n - Rauzy[n-1]]] + Rauzy[Abs[n - Rauzy[n-2]]]+ Rauzy[Abs[n - Rauzy[n-3]]] Rauzy[0]=Rauzy[1] = Rauzy[2]= Rauzy[3]= 1 digits=200 ta=Table[Rauzy[n], {n, 1, digits}]
%Y A087655 Cf. A005185.
%K A087655 nonn
%O A087655 1,4
%A A087655 _Roger L. Bagula_, Sep 26 2003