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 A166496 #2 Mar 30 2012 17:26:30 %S A166496 6,7,11,15,23,27,35,39,47,59,63,75,83,87,95,107,119,123,135,143,147, %T A166496 159,167,179,195,203,207,215,219,227,255,263,275,279,299,303,315,327, %U A166496 335,347,359,363,383,387,395,399,423,447,455,459,467,479,483,503,515,527 %N A166496 Prime plus the next composite. %C A166496 Differs from A072055 in the first term. %F A166496 a(n)=prime(n)+smallest composite > prime(n). %e A166496 a(1)=2+4=6, %e A166496 a(2)=3+4=7, %e A166496 a(3)=5+6=11. %t A166496 Prepend[2*Prime[Range[2,100]]+1,6] %Y A166496 Cf. A072055. %K A166496 nonn %O A166496 1,1 %A A166496 _Zak Seidov_, Oct 15 2009