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 A064954 #5 Mar 30 2012 16:49:14 %S A064954 1,2,3,8,17,31,64,122,240,485,982,1961,3932,7898,15820,31729,63576, %T A064954 127354,255162,511014,1023398,2049132,4102601,8213244 %N A064954 Positions of powers of 2 in A064413. %H A064954 J. C. Lagarias, E. M. Rains and N. J. A. Sloane, <a href="http://arXiv.org/abs/math.NT/0204011">The EKG sequence</a>, Exper. Math. 11 (2002), 437-446. %H A064954 <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a> %Y A064954 Cf. A064413, A064468. %K A064954 nonn %O A064954 1,2 %A A064954 _N. J. A. Sloane_, Oct 30 2001