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 A051615 #6 Oct 15 2013 22:30:30 %S A051615 5,11,17,23,29,41,47,53,71,83,89,107,113,131,137,167,173,179,191,197, %T A051615 227,233,239,251,257,263,281,293,317,347,359,401,419,431,443,449,467, %U A051615 491,509,557,569,587,593,599,617,641,647,653,659,677,683,701,719,743 %N A051615 Primes for which A051614 is 3. %F A051615 Odd p values such that F(2*p*F(2*p+1)+1)=3, where F(x) is the least prime divisor of x. %Y A051615 Cf. A000945, A051309 - A051335, A005384. %K A051615 nonn %O A051615 1,1 %A A051615 _Labos Elemer_