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 A137800 #3 Mar 31 2012 10:32:41 %S A137800 27,125,147,539,2197,2992,3249,50255,11774,15717,62271,265680,172000, %T A137800 34122,1133458,2313744,1060851,332387,1334232,404931,1388583,1357299, %U A137800 15800793,5516390,66896138,11962935,6085090,129761884,43216624,90972640 %N A137800 Consider the first run of composites that contains at least two numbers whose largest prime factor is prime(n), n >= 2. a(n) is the second of these numbers. %C A137800 For comments, examples and programs see sequence A137799, which gives the first of these numbers. %Y A137800 Cf. A137799. %K A137800 nonn %O A137800 2,1 %A A137800 _Enoch Haga_, Feb 11 2008 %E A137800 Edited and a(18) through a(31) added by _Klaus Brockhaus_, Feb 15 2008