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 A366687 #7 Jan 04 2024 17:01:41 %S A366687 1,3,2,5,2,4,4,4,3,7,3,7,4,6,5,8,3,6,5,7,4,7,4,7,7,6,3,10,6,6,6,7,4, %T A366687 13,6,11,7,5,4,11,5,6,9,5,6,13,6,7,5,8,6,11,3,7,9,13,7,12,6,7,8,6,4, %U A366687 13,3,10,8,9,7,14,8,6,10,8,8,13,6,12,12,7,10 %N A366687 Number of prime factors of 11^n + 1 (counted with multiplicity). %H A366687 Max Alekseyev, <a href="/A366687/b366687.txt">Table of n, a(n) for n = 0..325</a> %F A366687 a(n) = bigomega(11^n+1) = A001222(A034524(n)). %t A366687 PrimeOmega[11^Range[70]+1] %o A366687 (PARI) a(n)=bigomega(11^n+1) %Y A366687 Cf. A034524, A001222, A057934, A062308, A366686, A366688, A366689, A366690. %Y A366687 Cf. A054992, A057941, A057940, A057939, A057938, A057937, A057936, A057935, A057934, A366713. %K A366687 nonn %O A366687 0,2 %A A366687 _Sean A. Irvine_, Oct 16 2023