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 A177709 #3 Mar 30 2012 18:40:52
%S A177709 39,219,243,247,248,2319,2343,2347,2348,2523,2527,2528,2551,2552,2556,
%T A177709 30039,30063,30067,30068,30243,30247,30248,30271,30272,30276,32343,
%U A177709 32347,32348,32371,32372,32376,32551,32552,32556,32580,510519,510543
%N A177709 Sums of 4 distinct primorials.
%C A177709 This is to numbers that are the sum of 4 different primes (A177708) as primorials (A002110) are to primes (A000040). The subsequence of primes among these sums of 4 distinct primorials begins: 2347, 2551, 30271, 32371, 510751. The subsequence of nontrivial powers a^b with b>1 begin: a(3) = 243, a(24) = 30276 = 30030+210+30+6 = 2^2 x 3^2 x 29^2.
%F A177709 {a(n)} = {A002110(i) + A002110(j) + A002110(k)+ A002110(L) for distinct i, j, k, L}.
%e A177709 a(1) = 39 = 30+6+2+1
%e A177709 a(2) = 219 = 210+6+2+1
%e A177709 a(3) = 243 = 210+30+2+1 = 3^5
%e A177709 a(4) = 247 = 210+30+6+1
%e A177709 a(5) = 248 = 210+30+6+2.
%Y A177709 Cf. A000040, A002110, A006862, A038609, A124867, A177689, A177697, A177708.
%K A177709 easy,nonn
%O A177709 1,1
%A A177709 _Jonathan Vos Post_, May 11 2010
%E A177709 Corrected (2348 inserted) by _R. J. Mathar_, May 15 2010