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 A152561 #26 Oct 04 2024 10:02:25 %S A152561 0,10,196,2136,15437,70777,325147,6432163,198096465,15042141867, %T A152561 76590952427,82361153417,578451474249,6198243909905,410654730169643, %U A152561 2178891522315645,11458333085072746,112404439328411815,2539468772213180761,4415969241540963378,218809557168391974468 %N A152561 Smallest m such that 2^m begins with a 1 and n 0's. %H A152561 Zhao Hui Du, <a href="/A152561/b152561.txt">Table of n, a(n) for n = 0..500</a> %F A152561 a(n) = A018856(10^n). - _Andrew Howroyd_, Sep 30 2024 %e A152561 2^a(0) = 2^0 = 1 %e A152561 2^a(1) = 2^10 = 1024 %e A152561 2^a(2) = 2^196 = 1004336277661868922... %e A152561 2^a(3) = 2^2136 = 1000162894137615530... %e A152561 2^a(4) = 2^15437 = 1000099165462017237... %e A152561 2^a(5) = 2^70777 = 1000007160137454597... %Y A152561 Cf. A000079, A011557, A018856. %K A152561 base,nonn %O A152561 0,2 %A A152561 _Jon E. Schoenfield_, Dec 07 2008 %E A152561 a(0)=0 prepended by _Pontus von Brömssen_, May 11 2021 %E A152561 a(18) and above from _Zhao Hui Du_, Oct 03 2024