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 A124692 #11 Sep 24 2018 16:53:14 %S A124692 1,1,3,10,2,10,5,3,11,13,2,5,20,4,3,24,19,5,17,19,35,25,53,67,60,61, %T A124692 33,74,18,109,17,30,117,96,66,14,57,62,97,80,25,81,38,112,143,152,2, %U A124692 92,122,113,129,93,20,159,138,187,26,57,35,105,158,9,50,58,198,185,182,42,17 %N A124692 Position of substring A032740(n) within the decimal expansion of 2^A032740(n). %C A124692 A032740 includes numbers n that are a substring of 2^n. %H A124692 David W. Wilson, <a href="/A124692/b124692.txt">Table of n, a(n) for n = 1..10000</a> %e A124692 A032740(1) = 6 is a substring of 64 = 2^6 starting at position 1, so a(1) = 1. %e A124692 A032740(2) = 10 is a substring of 1024 = 2^10 starting at position 1, so a(2) = 1. %e A124692 A032740(3) = 36 is a substring of 68719476736 = 2^36 starting at position 10, so a(3) = 10. %K A124692 base,easy,nonn %O A124692 1,3 %A A124692 _Cino Hilliard_, Dec 25 2006, corrected Jun 26 2007 %E A124692 Edited by _N. J. A. Sloane_ at the suggestion of _Andrew S. Plewe_, Jun 23 2007