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 A057983 #5 Mar 30 2012 18:34:55 %S A057983 1,2,3,4,7,13,15,39,43,54,1227,1796,2674,3464,6057,7650,17083 %N A057983 These numbers take a record number of steps to reach the top of the deck in Guy's shuffle (see A035485). %C A057983 See A057984 for the number of steps for these to reach the top of the deck. %D A057983 D. Gale, Tracking the Automatic Ant and Other Mathematical Explorations, Springer, 1998, chapter 5. %D A057983 D. Gale, Mathematical Entertainments: "Careful Card-Shuffling and Cutting Can Create Chaos," The Mathematical Intelligencer, vol. 14, no. 1, 1992, pages 54-56. %e A057983 In Guy's shuffle, 4 takes 8 shuffles to reach the top, no smaller number takes more shuffles, so 4 is in the sequence. %Y A057983 Cf. A035485, A035490, A035493, A035494, A057984, A060750-A060752. %Y A057983 A057984 = A035490(A057983). %K A057983 hard,nonn %O A057983 0,2 %A A057983 _Jud McCranie_, Oct 24 2000