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 A102284 #16 Jun 14 2013 11:48:49 %S A102284 2,3,4,6,4,7,11,5,16,5,23,8,6,20,11,18,38,29,12,28,6,24,30,10,12,38, %T A102284 44,24,100,17,48,72,18,14,21,106,52,29,27,75,44,7,37,26,36,14,136,140, %U A102284 10,59,72,42,28,15,89,47,24,34,24,110,80,72,26,46,66,141,15,10,80,68,88,38,51,20,47,66,16,107,25,58 %N A102284 Length of primitive cycle mentioned in A102280. %H A102284 Geoffrey H. Morley, <a href="/A102284/b102284.txt">Table of n, a(n) for n = 1..10000</a> %H A102284 J. C. Lagarias, <a href="http://pldml.icm.edu.pl:80/mathbwn/element/bwmeta1.element.bwnjournal-article-aav56i1p33bwm?q=bwmeta1.element.bwnjournal-number-aa-1990-56-1&qt=CHILDREN-STATELESS">The set of rational cycles for the 3x+1 problem,</a> Acta Arith. 56 (1990), 33-53. - See Table 3.1 on page 41. But there are errors - a(12)[k=35] and a(25)[k=73] are incorrect. %Y A102284 Cf. A102280, A226634. %K A102284 nonn %O A102284 1,1 %A A102284 _N. J. A. Sloane_, Feb 19 2005 %E A102284 a(12) and a(25) corrected and more terms added by _Geoffrey H. Morley_, Mar 14 2013