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 A050527 #7 Mar 30 2012 16:48:37 %S A050527 29,113,449,114689,7340033,469762049,7881299347898369, %T A050527 31525197391593473,34662321099990647697175478273, %U A050527 9304595970494411110326649421962412033,167616699782206593882944206094565066958299591488831489 %N A050527 Primes of form 7*2^n+1. %H A050527 <a href="/index/Pri#riesel">Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime</a> %Y A050527 For more terms see A032353. %K A050527 nonn %O A050527 1,1 %A A050527 _N. J. A. Sloane_, Dec 29 1999