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 A145524 #4 Mar 31 2012 13:48:25 %S A145524 1,9,74,449,599,11224,55374,3099324,3099324 %N A145524 Least integer k>0 such that A000041(k) is divisible by 10^n. %C A145524 The requirement a(n)>0 is somewhat arbitrary, chosen for agreement with A046641 ; a(n)>=0 would have been possible, too, yielding a(0)=0. %C A145524 a(9) > 10^7. [From _Max Alekseyev_, Oct 18 2008] %F A145524 a(n) = A046641(10^n) %Y A145524 Cf. A000041, A046641, A145523 %K A145524 more,nonn %O A145524 0,2 %A A145524 _M. F. Hasler_, Oct 12 2008 %E A145524 a(6)..a(8) from _Max Alekseyev_, Oct 18 2008