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 A155779 #9 Jun 24 2013 04:56:19 %S A155779 3,5,7,11,17,19,29,31,79,89,127,1889,3511,8971,13331 %N A155779 Primes p such that 2^(p-1)+7 is prime. %C A155779 Primes of the form 1+A057195(k). [_R. J. Mathar_, Feb 19 2009] %t A155779 Select[Prime[Range[15000]], PrimeQ[(2^(# - 1) + 7)] &] (* _Vincenzo Librandi_, Jun 24 2013 *) %K A155779 nonn %O A155779 1,1 %A A155779 _Vincenzo Librandi_, Jan 27 2009