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 A136012 #3 Mar 31 2012 10:32:41 %S A136012 14,15,20,21,22,33,34,35,36,38,39,40,44,45,46,50,51,52,54,55,56,57,58, %T A136012 62,63,68,69,74,75,76,77,85,86,87,88,91,92,93,94,95,96,98,99,100,111, %U A136012 112,115,116,117,118,119,122,123,124,133,134,135,136,141,142,143,144 %N A136012 Numbers n in any run of two or more numbers each having exactly two distinct prime divisors. %e A136012 a(3) to a(5), 20 to 22, are a run of 3 consecutive numbers each having exactly 2 distinct prime divisors. %Y A136012 Cf. A001221, A064709. %K A136012 easy,nonn %O A136012 1,1 %A A136012 _Enoch Haga_, Dec 09 2007 %E A136012 Corrected and edited by _R. J. Mathar_, Dec 12 2007