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 A060520 #7 Mar 30 2012 18:34:55 %S A060520 653,16631,40487,50033,52517,67631,80803,138107,145253,147197 %N A060520 Primes p that have at least four primitive roots that are not primitive roots mod p^2. %C A060520 40487 is unusual - it has four primitive roots with this property (5, 5^3, 5^5, 4492) and 5 is the least positive primitive root mod 40487 - see A055578. %e A060520 13425, 18243, 34196, 38462, 39362 and 51787 are primitive roots mod 52517, but not mod 52517^2. %Y A060520 Cf. A060503, A055578, A060518, A060519. %K A060520 more,nonn %O A060520 1,1 %A A060520 _Jud McCranie_, Mar 24 2001