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 A146538 #5 Oct 15 2012 18:35:42 %S A146538 6,12,18,22,24,30,32,36,42,46,48,52,54,60,62,66,72,74,78,82,84,88,90, %T A146538 92,96,102,108,112,114,116,118,120,122,126,130,132,138,140,142,144, %U A146538 150,152,156,158,162,166,168,172,174,180,182,184,186,192,198,200,202,204,206 %N A146538 Even numbers n such that n+3 is not a prime. %t A146538 Select[2*Range[150],!PrimeQ[#+3]&] (* _Harvey P. Dale_, Oct 15 2012 *) %Y A146538 Cf. A086801. %K A146538 easy,nonn %O A146538 1,1 %A A146538 _Giovanni Teofilatto_, Oct 31 2008 %E A146538 54 and 66 inserted, 7274 split, 78 inserted, 176 removed by _R. J. Mathar_, Dec 04 2008