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 A125634 #11 Mar 20 2025 22:33:33 %S A125634 2,127,2819,2819,2342959,2342959,47579927,3620189879,513127081109, %T A125634 8388044818849,77460384757423,2649283656602003,252317900773542353, %U A125634 2467410166021233673,50407811312994280933,179869204428830533411 %N A125634 Smallest prime p such that 19^n divides p^18 - 1. %H A125634 W. Keller and J. Richstein <a href="http://www1.uni-hamburg.de/RRZ/W.Keller/FermatQuotient.html">Fermat quotients that are divisible by p</a>. %o A125634 (PARI) \\ See A125609 - _Martin Fuller_, Jan 11 2007 %Y A125634 Cf. A125609 = Smallest prime p such that 3^n divides p^2 - 1. Cf. A125610 = Smallest prime p such that 5^n divides p^4 - 1. Cf. A125611 = Smallest prime p such that 7^n divides p^6 - 1. Cf. A125612 = Smallest prime p such that 11^n divides p^10 - 1. Cf. A125632 = Smallest prime p such that 13^n divides p^12 - 1. Cf. A125633 = Smallest prime p such that 17^n divides p^16 - 1. Cf. A125635 = Smallest prime p such that 257^n divides p^256 - 1. %K A125634 hard,nonn %O A125634 1,1 %A A125634 _Alexander Adamchuk_, Nov 28 2006 %E A125634 More terms from _Martin Fuller_, Jan 11 2007