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 A124111 #5 Mar 26 2025 15:47:30 %S A124111 5,7,11,23,31,191,409,1151,2161,2689,3361,4729,9601,14281,23209,31249, %T A124111 33049,55441,71761,110881,2116921,3384481,5109721,222855361,288940681, %U A124111 567719161,831143041,899978641 %N A124111 Primes with record large values of the second smallest positive primitive root. %C A124111 Sequence begins at the first prime with at least 2 primitive roots, namely 5. %e A124111 The smallest two positive primitive roots of a(26)=567719161 are 43 and 172. No integer less than 567719161 has a second root greater than or equal to 172. %Y A124111 Cf. A002230. %K A124111 nonn,more %O A124111 1,1 %A A124111 _Ken Takusagawa_, Nov 27 2006