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 A074321 #6 Mar 30 2012 17:26:02 %S A074321 1,3,4,6,10,13,24,25,34,37,49,50,52,73,74,93,106,109,127,142,160,177, %T A074321 178,193,208,212,228,234,235,250,253,262,275,276,279,281,282,284,298, %U A074321 333,336,337,339,360,385,402,405,407,417,442,468,474,478,480,487 %N A074321 Numbers n such that n-th perfect power + n is prime: n + A001597(n) is prime. %C A074321 Primes of the form n + A001597(n) in A075781. %e A074321 n=3: pp(3)+3=8+3=11 is prime. %Y A074321 Cf. A001597, A075781. %K A074321 easy,nonn %O A074321 1,2 %A A074321 _Zak Seidov_, Oct 11 2002