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 A113699 #6 May 16 2020 12:04:31 %S A113699 1,2,4,8,16,32,64,128,256,512,1024,3,5,9,17,33,65,129,257,513,1025, %T A113699 2049,6,10,18,34,66,130,258,514,1026,2050,4098,11,19,35,67,131,259, %U A113699 515,1027,2051,4099,8195,20,36,68,132,260,516,1028,2052,4100,8196,16388,37 %N A113699 Index of the occurrence of n in A113698. %C A113699 The index of n is 2^(n-1) for n < 12. %Y A113699 Cf. A113698. %K A113699 nonn,base %O A113699 1,2 %A A113699 _Amarnath Murthy_, Nov 11 2005 %E A113699 More terms from and terms corrected by _Jinyuan Wang_, May 16 2020