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 A143041 #4 Mar 31 2012 10:26:07 %S A143041 105,455,2988,26128,258764,2677258,28013887,293553638,3072062072, %T A143041 32084334808 %N A143041 10^n-th number divisible by exactly 3 distinct primes. %D A143041 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 455, pp 94, Ellipses, Paris 2008. %F A143041 a(n)=A033992(10^n). %Y A143041 Cf. A033992. %K A143041 more,nonn %O A143041 1,1 %A A143041 _Lekraj Beedassy_, Jul 18 2008 %E A143041 a(8)-a(10) from _Donovan Johnson_, Mar 30 2010