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 A143043 #4 Mar 31 2012 10:26:07 %S A143043 6006,17490,67860,331674,1980902,13757850,106254070,882141222, %T A143043 7687451167,69242679948 %N A143043 10^n-th number divisible by exactly 5 distinct primes. %D A143043 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 455, pp 94, Ellipses, Paris 2008. %F A143043 a(n)=A051270(10^n). %Y A143043 Cf. A051270. %K A143043 more,nonn %O A143043 1,1 %A A143043 _Lekraj Beedassy_, Jul 18 2008 %E A143043 a(8)-a(10) from _Donovan Johnson_, Mar 30 2010