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 A368115 #9 Jun 09 2024 08:35:47 %S A368115 17,290,145,29,494,247,19,324,162,81,27,9,3,1,18,9,3,1,18,9,3,1,18,9, %T A368115 3,1,18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1, %U A368115 18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1,18,9,3,1 %N A368115 Trajectory of 17 under the '17x+1' map. %C A368115 See A368085 for definition and cross references. %H A368115 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,1). %t A368115 Px1[p_,n_]:=Catch[For[i=1,i<PrimePi[p],i++,If[Divisible[n,Prime[i]],Throw[n/Prime[i]]]];p*n+1];NestList[Px1[17,#]&,17,100] %Y A368115 Cf. A368085. %K A368115 nonn,easy %O A368115 0,1 %A A368115 _Paolo Xausa_, Dec 12 2023