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 A273099 #16 Jul 04 2016 08:43:57 %S A273099 12,90,675,37125,32625,86625,76125,202125,177625,471625,557375,104125, %T A273099 95550,17850,16380,3060,2808,2376,2088,5544,4872,12936,11368,30184, %U A273099 35672,6664,392,2940,22050,165375,23625,3375,185625,163125,433125,380625,1010625,888125,2358125,2786875 %N A273099 Successive integers produced by Conway's PRIMEGAME, starting with 12 rather than 2. %C A273099 After 240 steps, this sequence reaches 32 = 2^5. %H A273099 Alonso del Arte, <a href="/A273099/b273099.txt">Table of n, a(n) for n = 1..250</a> %e A273099 Multiply 12 by 15/2 to obtain 90. Then for 90, we can multiply 90 by 15/2 also to obtain 675. %t A273099 (* First run the program for A203907 to define conwayProc *) NestList[conwayProc, 12, 50] %Y A273099 Cf. A185242, A273091. %K A273099 nonn,easy %O A273099 1,1 %A A273099 _Alonso del Arte_, May 15 2016