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 A117325 #4 Mar 30 2012 18:40:36 %S A117325 1,2,3,4,5,6,7,8,9,10,11,12,14,16,22,25,29,33,35,50,64,73,76,82,88, %T A117325 100,115,120,169,174,176,188,194,202,211,214,218,249,265,325,354,363, %U A117325 369,370,371,372,373,374,378,379,380,384,385,386,393,394,395,396,399,400 %N A117325 Indices of primes in A117322 prime(n) modulo semiprime(n). %F A117325 n such that A117322(n) is prime. n such that A000040(n) modulo A001358(n) is in A000040. %e A117325 a(60) = 400 because semiprime(400) = 1355, prime(400) = 2741 and %e A117325 2741 == 31 mod 1355, where 31 is prime. %K A117325 easy,nonn %O A117325 1,2 %A A117325 _Jonathan Vos Post_, Mar 08 2006