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 A366708 #7 Jan 04 2024 13:31:34 %S A366708 1,2,2,4,2,5,3,6,4,4,4,8,3,6,6,9,3,9,2,8,5,6,4,12,4,8,6,10,5,13,5,11, %T A366708 8,6,9,14,3,6,7,14,4,14,5,12,12,8,3,18,5,10,6,13,7,16,8,13,7,8,4,19,4, %U A366708 8,8,13,8,17,5,10,7,14,4,21,3,7,11,11,11,18,4 %N A366708 Number of prime factors of 12^n - 1 (counted with multiplicity). %H A366708 Max Alekseyev, <a href="/A366708/b366708.txt">Table of n, a(n) for n = 1..310</a> %F A366708 a(n) = bigomega(12^n-1) = A001222(A024140(n)). %t A366708 PrimeOmega[12^Range[70]-1] %o A366708 (PARI) a(n)=bigomega(12^n-1) %Y A366708 Cf. A024140, A001222, A046051, A057951, A057952, A057953, A057954, A057955, A057956, A057957, A057958, A250288, A252170, A366707, A366709, A366682. %K A366708 nonn %O A366708 1,2 %A A366708 _Sean A. Irvine_, Oct 17 2023