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 A191330 #4 Mar 30 2012 18:57:32 %S A191330 4,8,10,14,20,24,26,30,36,40,46,50,52,56,62,66,68,72,76,78,82,88,92, %T A191330 94,98,104,108,114,118,120,124,130,134,136,140,144,146,150,156,160, %U A191330 162,166,172,176,178,182,186,188,192,198,202,204,208,214,218,224,228,230,234,240,244,246,250,254,256,260,266,270,272,276,282,286 %N A191330 Positions of 0 in A191329. %C A191330 A191330=2*A005653. %e A191330 A191329=(1,2,1,0,1,2,1,0,1,0,1,2,1,0,1...), %e A191330 so that a(1)=4, a(2)=8, a(3)=10,... %t A191330 (See A191329.) %Y A191330 Cf. A191329, A005653. %K A191330 nonn %O A191330 1,1 %A A191330 _Clark Kimberling_, May 31 2011