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 A164074 #2 Mar 31 2012 10:22:38 %S A164074 13,17,29,31,41,53,59,137,157,173,251,293,347,1373,1459,2213,3253, %T A164074 4493,5333,6863,6961,8219,8317,9413,10613,11317,16811,18773,20359, %U A164074 24421,24517,26437,26573,27893,37253,54293,70969,76733,78157,80173,85853 %N A164074 Prime p of the form a^b + c^d = p, where a, b, c, d are also primes. %e A164074 2^2 + 3^2 = 13; 2^3 + 3^2 = 17; 2^2 + 5^2 = 29; 3^3 + 2^2 = 31; %K A164074 nonn %O A164074 1,1 %A A164074 _Oleg Zyakun_, Aug 12 2009