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 A107438 #11 Oct 06 2013 07:58:19 %S A107438 2,3,5,11,17,23,41,47,53,71,83,101,107,113,131,137,167,173,191,197, %T A107438 227,251,257,281,293,311,317,347,353,383,401,431,461,467,503,521,563, %U A107438 587,593,641,647,677,683,701,743,773,797,821,827,857,863,887,911,941,947 %N A107438 Primes p such that 7*p+2 or 2*p+7 is prime. %t A107438 Select[Prime[Range[220]], PrimeQ[2#+7]||PrimeQ[7#+2]&] (* Shepherd *) %o A107438 (PARI) isok(n) = isprime(n) && (isprime(7*n+2) || isprime(2*n+7)); \\ _Michel Marcus_, Oct 06 2013 %Y A107438 Cf. A105760 Numbers n such that (2*n + 7) is prime; A105772 Numbers n such that (7*n + 2) is prime. %K A107438 nonn %O A107438 1,1 %A A107438 _Zak Seidov_, May 26 2005 %E A107438 Edited by _Rick L. Shepherd_, Feb 01 2006