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 A057937 #25 Aug 30 2023 09:53:24
%S A057937 3,3,4,2,5,5,5,3,5,6,5,5,5,4,7,3,4,6,5,4,8,6,4,4,6,5,6,6,4,10,6,4,8,6,
%T A057937 11,8,5,4,9,6,7,7,10,5,12,7,4,6,12,11,8,5,7,9,13,8,9,7,7,9,4,6,14,4,9,
%U A057937 12,6,5,8,10,5,9,6,4,11,7,12,10,7,6,10,6,5,12,8,6,8,5,8,14,11,6,9,6,11
%N A057937 Number of prime factors of 7^n + 1 (counted with multiplicity).
%H A057937 Max Alekseyev, <a href="/A057937/b057937.txt">Table of n, a(n) for n = 1..387</a> (first 372 terms from Amiram Eldar)
%H A057937 S. S. Wagstaff, Jr., <a href="https://homes.cerias.purdue.edu/~ssw/cun/index.html">The Cunningham Project</a>
%F A057937 a(n) = A057954(2n) - A057954(n). - _T. D. Noe_, Jun 19 2003
%F A057937 a(n) = A001222(A034491(n)). - _Amiram Eldar_, Feb 02 2020
%t A057937 PrimeOmega[Table[7^n + 1, {n, 1, 30}]] (* _Amiram Eldar_, Feb 02 2020 *)
%o A057937 (Magma) f:=func<n|&+[p[2]: p in Factorization(n)]>; [f(7^n + 1):n in [1..110]]; // _Marius A. Burtea_, Feb 02 2020
%Y A057937 bigomega(b^n+1): A057934 (b=10), A057935 (b=9), A057936 (b=8), this sequence (b=7), A057938 (b=6), A057939 (b=5), A057940 (b=4), A057941 (b=3), A054992 (b=2).
%Y A057937 Cf. A001222, A034491, A057954, A227575.
%K A057937 nonn
%O A057937 1,1
%A A057937 _Patrick De Geest_, Oct 15 2000