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 A084457 #9 Jul 29 2017 13:30:34 %S A084457 7,11,13,38,19,25,140,70,35,21,74,37,82,41,276,138,69,98,49,536,268, %T A084457 134,67,97,2096,1048,524,262,131,73,548,274,137,324,162,81,1064,532, %U A084457 266,133,322,161,4176,2088,1044,522,261,386,193,8288,4144,2072,1036,518,259,145 %N A084457 Juggling states associated with the juggling sequence A084458. %H A084457 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %F A084457 a(0)=7, a(n) = (A084457(n-1) + 2^A084458(n) - 1)/2. %Y A084457 Same sequence in binary: A084456. %Y A084457 Terms that are odd: A084467. %K A084457 nonn %O A084457 0,1 %A A084457 _Antti Karttunen_, Jun 02 2003