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 A051616 #11 Sep 23 2021 02:03:48 %S A051616 17,47,71,107,137,167,197,227,257,263,317,347,401,449,467,557,569,587, %T A051616 599,617,647,677,701,797,827,839,857,863,881,887,929,947,971,977,1061, %U A051616 1097,1181,1187,1217,1259,1277,1283,1307,1367,1373,1427,1433,1487,1493 %N A051616 Primes p for which A051614(p) is 3 but are not Sophie Germain primes. %F A051616 p values so that F(2*p*F(2*p+1)+1)=3 and 2p+1 is not prime; F(x) is the least prime divisor of x. %Y A051616 Cf. A000945, A051309-A051335, A005384 (Sophie Germain primes). %K A051616 nonn %O A051616 1,1 %A A051616 _Labos Elemer_ %E A051616 Name corrected by _Sean A. Irvine_, Sep 22 2021