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 A176578 #4 Mar 30 2012 17:31:29
%S A176578 2,7,23,89,1607,1753,2351,7393,19543,20593,46639,54449,284527,344249,
%T A176578 407791,512009,812431,844433,1214407,1316033,2109671,2233601,11251351,
%U A176578 11267777,13903271,14449489,16203287,16451713,18219679,18367721
%N A176578 Slowest increasing sequence of odd primes such that the partial sums of the sequence from the second on are perfect powers.
%H A176578 Robert G. Wilson v, <a href="/A176578/b176578.txt">Table of n, a(n) for n = 1..70 </a>
%t A176578 fQ[n_] := GCD @@ Last /@ FactorInteger@n > 1; p = 3; sp = 2; lst = {2}; While[p < 10^9, If[ fQ[sp + p], AppendTo[lst, p]; Print@p; sp = sp + p]; p = NextPrime@p]; lst
%Y A176578 Cf. A001597, A174722, A137355.
%K A176578 nonn
%O A176578 1,1
%A A176578 _Robert G. Wilson v_, Apr 20 2010