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 A070873 #9 May 16 2013 08:32:10 %S A070873 5,9,10,13,17,18,19,20,21,22,25,26,34,35,36,37,38,41,42,43,44,45,46, %T A070873 49,50,51,52,53,54,57,58,68,69,70,73,74,75,76,77,78,81,82,83,84,85,86, %U A070873 87,89,90,91,92,93,94,97,98,99,100,101,102,105,106,107 %N A070873 A070871(n) > n. %C A070873 It appears that if n is in the sequence then 2n is too. [_Ralf Stephan_, May 16 2013] %K A070873 nonn %O A070873 1,1 %A A070873 _N. J. A. Sloane_, May 19 2002