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 A064740 #16 Dec 11 2021 02:38:05 %S A064740 2,2,2,3,3,3,2,2,5,5,3,2,7,7,3,2,2,2,11,11,3,3,5,5,7,2,13,13,3,2,2,17, %T A064740 17,3,2,19,19,3,5,2,2,23,23,3,2,2,2,2,7,7,3,5,5,5,2,29,29,3,2,31,31,3, %U A064740 2,2,2,37,37,3,3,2,2,2,41,41,3,3,7,11,2,43,43,3,5,5,5,2,2,47,47,3,2,7 %N A064740 Smallest controlling prime when A064413(n) is computed. %H A064740 Michael De Vlieger, <a href="/A064740/b064740.txt">Table of n, a(n) for n = 2..10000</a> %H A064740 Michael De Vlieger, <a href="/A064740/a064740.txt">Mathematica code</a> based on Lagarias-Rains-Sloane 2002, efficiently generates this sequence. %H A064740 J. C. Lagarias, E. M. Rains and N. J. A. Sloane, <a href="https://arxiv.org/abs/math/0204011">The EKG sequence</a>, Exper. Math. 11 (2002), 437-446; arXiv:math/0204011 [math.NT], 2002. %H A064740 <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a> %F A064740 a(n) = A020639(A073734(n)). - _Michael De Vlieger_, Dec 10 2021 %Y A064740 Cf. A064413, A064741, A064742, A064743, A020639, A073734. %K A064740 nonn,easy %O A064740 2,1 %A A064740 _N. J. A. Sloane_, Oct 18 2001 %E A064740 More terms from _David Wasserman_, Aug 05 2002