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 A157724 #4 Mar 30 2012 16:51:17 %S A157724 5,7,8,9,12,13,15,16,18,19,20,21,24,25,28,30,31,32,33,36,39,40,42,43, %T A157724 44,45,48,49,50,52,54,55,56,60,61,63,64,66,68,69,70,72,73,75,76,78,80, %U A157724 81,84,85,88,90,91,92,96,98,99,100,102,103,104,105,108,109,110,111,112,114,115 %N A157724 Numbers that are the sum of two distinct primes but are not twice a prime. %H A157724 Zak Seidov, <a href="/A157724/b157724.txt">Table of n, a(n) for n = 1..1000</a> %e A157724 10 = 3+7 is not a member since also 10 = 2*5. %Y A157724 Cf. A038609. %K A157724 nonn %O A157724 1,1 %A A157724 _N. J. A. Sloane_, Jul 05 2010