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 A071853 #7 Mar 31 2012 13:50:44 %S A071853 11,38,51,70,84,92,107,147,155,167,279,310,326,354,377,403,469,475, %T A071853 489,534,588,607,619,669,685,687,710,783,805,820,848,898,947,1010, %U A071853 1101,1207,1332,1467,1481,1520,1556,1578,1738,1744,1796,1802 %N A071853 Numbers n such that for any x, C(2x,x) never has n distinct prime factors. %F A071853 n such that Card ( x : A067434(x) = n ) = 0 %K A071853 nonn %O A071853 1,1 %A A071853 _Benoit Cloitre_, Jun 09 2002 %E A071853 More terms from _Naohiro Nomoto_, Jun 16 2002