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 A081058 #5 Mar 30 2012 18:34:55 %S A081058 8,263,4,23,370,790,43,48,218,5,12,22,11,29,53,26,231,583,90,271,1988, %T A081058 14,52,17,6,286,31,39,40,15,320158,354,812,487,118,43,758,470,78,689, %U A081058 39,29,18,12552564,70,249,53,2054,10,43,409,309,13519,224,26,7,35,800 %N A081058 Number of shuffles in Guy's shuffle (see A035485) for the card that is at the top of the deck after n shuffles to come to the top again. %C A081058 Corresponding shuffle number is in A081059. A081059[n]=A081058[n]+n. %e A081058 After 2 shuffles, card #3 is on top. It reaches the top again on shuffle # 265 (263 shuffles later), so a(2)=263. %Y A081058 Cf. A035485, A060750, A060751, A081059. %K A081058 nonn %O A081058 1,1 %A A081058 _Jud McCranie_, Mar 04 2003