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 A366686 #7 Jan 04 2024 16:58:19 %S A366686 1,2,2,3,2,3,4,3,3,4,3,6,4,5,5,6,3,5,5,6,4,5,4,6,7,5,3,6,6,5,6,6,4,11, %T A366686 6,9,7,4,4,9,5,5,9,4,6,10,6,6,5,7,6,9,3,6,9,12,7,10,6,6,8,5,4,10,3,9, %U A366686 8,8,7,12,8,5,10,7,8,11,6,11,11,6,10,9,5 %N A366686 Number of distinct prime divisors of 11^n + 1. %H A366686 Max Alekseyev, <a href="/A366686/b366686.txt">Table of n, a(n) for n = 0..325</a> %F A366686 a(n) = omega(11^n+1) = A001221(A034524(n)). %o A366686 (PARI) for(n = 0, 100, print1(omega(11^n + 1), ", ")) %Y A366686 Cf. A034524, A001221, A366681, A102347, A366687, A366688, A366689, A366690. %Y A366686 Cf. A046799, A119704, A366712. %K A366686 nonn %O A366686 0,2 %A A366686 _Sean A. Irvine_, Oct 16 2023