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 A273091 #7 May 27 2016 12:42:14 %S A273091 6,45,2475,2175,5775,5075,13475,15925,2975,2730,510,468,396,348,924, %T A273091 812,2156,2548,476,28,210,1575,225,12375,10875,28875,25375,67375, %U A273091 79625,14875,13650,2550,2340,1980,1740,4620,4060,10780,12740,2380,2184,408,152,92,380,230,950,575,2375,9625 %N A273091 Successive integers produced by Conway's PRIMEGAME, starting with 6 rather than 2. %C A273091 Upon reaching 225, this sequence becomes the same as A007542, having skipped over 4 (which corresponds to the prime 2) and then goes on to 8 (which corresponds to the prime 3). %e A273091 Multiply 6 by 15/2 to obtain 45. Then for 45, multiplying by the first thirteen fractions fails to produce an integer, so 45 * 55 = 2475. %t A273091 (* First run the program for A203907 to define conwayProc *) NestList[conwayProc, 6, 50] %Y A273091 Cf. A185242. %K A273091 nonn,easy %O A273091 1,1 %A A273091 _Alonso del Arte_, May 14 2016