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 A060519 #7 Mar 30 2012 18:34:55 %S A060519 1103,6569,13187,14939,15313,16649,18587,22091,22769,25163,26189, %T A060519 26759,32069,32647,33289,34381,34939,37397,38459,39047,42863,47189, %U A060519 47699,54011,54139,57173,57527,57923,59539,61553,63311,63347,63467 %N A060519 Primes p that have exactly three primitive roots that are not primitive roots mod p^2. %C A060519 If x is a primitive root mod prime p then either x is a primitive root mod p^2 or x has order p-1 mod p^2. %e A060519 284, 793 and 1054 are primitive roots mod 1103, but not mod 1103^2. %Y A060519 Cf. A060503, A055578, A060518, A060520. %K A060519 nonn %O A060519 1,1 %A A060519 _Jud McCranie_, Mar 24 2001