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 A366707 #9 Jan 04 2024 13:25:02 %S A366707 1,2,2,4,2,5,3,6,4,4,3,8,3,6,6,9,3,9,2,7,5,5,4,12,4,7,6,10,5,13,5,11, %T A366707 7,6,9,14,3,6,7,13,4,13,5,11,12,8,3,18,5,10,6,12,7,16,7,13,7,8,4,18,4, %U A366707 8,8,13,8,16,5,10,7,14,4,21,3,7,11,11,10,17,4 %N A366707 Number of distinct prime divisors of 12^n - 1. %H A366707 Max Alekseyev, <a href="/A366707/b366707.txt">Table of n, a(n) for n = 1..310</a> %F A366707 a(n) = omega(12^n-1) = A001221(A024140(n)). %o A366707 (PARI) for(n = 1, 100, print1(omega(12^n - 1), ", ")) %Y A366707 Cf. A024140, A001221, A046800, A133801, A102347, A250288, A252170, A366708, A366709, A366681. %K A366707 nonn %O A366707 1,2 %A A366707 _Sean A. Irvine_, Oct 17 2023