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 A275383 #23 Jul 27 2016 10:23:39
%S A275383 1,2,2,3,2,2,5,2,5
%N A275383 Number of prime factors (with multiplicity) of generalized Fermat number 12^(2^n) + 1.
%H A275383 Arkadiusz Wesolowski, <a href="/A275383/a275383.txt">A 96-digit prime factor of b(8)</a>
%F A275383 a(n) = A001222(A152585(n)). - _Felix Fröhlich_, Jul 25 2016
%e A275383 b(n) = 12^(2^n) + 1.
%e A275383 Complete Factorizations
%e A275383 b(0) = 13
%e A275383 b(1) = 5*29
%e A275383 b(2) = 89*233
%e A275383 b(3) = 17*97*260753
%e A275383 b(4) = 153953*1200913648289
%e A275383 b(5) = 769*44450180997616192602560262634753
%e A275383 b(6) = 36097*81281*69619841*73389730593973249*P35
%e A275383 b(7) = 257*P136
%e A275383 b(8) = 8253953*295278642689*5763919006323142831065059613697*P96*P132
%t A275383 Table[PrimeOmega[12^(2^n) + 1], {n, 0, 7}] (* _Michael De Vlieger_, Jul 26 2016 *)
%o A275383 (PARI) a(n) = bigomega(factor(12^(2^n)+1))
%Y A275383 Cf. A152585, A273950.
%K A275383 nonn,hard,more
%O A275383 0,2
%A A275383 _Arkadiusz Wesolowski_, Jul 25 2016
%E A275383 a(8) was found in 2009 by Tom Womack