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 A138946 #2 Jul 14 2012 11:32:20 %S A138946 1,2,9,13,18,22,26,30,35,39,43,48,52,56,61,65,69,74,78,82,87,91,95, %T A138946 100,104,109,113,117,122,126,131,135,140,144,148,153,157,162,166,171, %U A138946 175,180,184,189,193,198,202,207,212,216,221,225,230,234,239,243,248,253 %N A138946 Positive integers not in A073071. %o A138946 (PARI) pp=1;k=0;forprime(p=1,9999,pp*=p;while(k++!<=pp,print1(k"," ))) %Y A138946 Cf. A073071, A138945. %K A138946 nonn,easy %O A138946 1,2 %A A138946 _M. F. Hasler_, May 02 2008