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 A177689 #2 Mar 30 2012 18:40:52
%S A177689 3,7,8,31,32,36,211,212,216,240,2311,2312,2316,2340,30031,30032,30036,
%T A177689 30060,30240,32340,510511,510512,510516,510540,510720,512820,540540,
%U A177689 9699691,9699692,9699696,9699720,9699900,9702000,9729720,10210200
%N A177689 Sums of 2 distinct primorials.
%C A177689 This is to numbers that are the sum of 2 different primes (A038609) as primorials (A002110) are to primes (A000040). The subsequence of primes among these sums of 2 distinct primorials is the sequence of primorial primes (A018239) which is the same as the subsequence of primes among the Euclid numbers (A006862).
%F A177689 {a(n)} = {A002110(i) + A002110(j) for i =/= j}.
%Y A177689 Cf. A000040, A002110, A006862, A038609.
%K A177689 easy,nonn
%O A177689 1,1
%A A177689 _Jonathan Vos Post_, May 11 2010