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 A355243 #7 Dec 22 2024 10:52:26
%S A355243 5,11,25,55,125,277,637,1421,3237,7553,16807,38661,90209,208397
%N A355243 a(n) is the largest integer value of Product_{k=1..n} (2 + 1/t_k) with integers t_k > 1.
%e A355243 a(2) = 5 = (2 + 1/3) * (2 + 1/7),
%e A355243 a(3) = 11 = (2 + 1/3) * (2 + 1/5) * (2+1/7) = (2 + 1/3)^2 * (2 + 1/49),
%e A355243 a(7) = 277 = (2 + 1/3)^5 * ( 2 + 1/405) * (2 + 1/13630477).
%o A355243 (PARI) \\ See link in A355626
%Y A355243 A355626 gives more information.
%Y A355243 A355630 same problem with factors (3 + 1/t_k).
%K A355243 nonn,hard,more
%O A355243 2,1
%A A355243 _Hugo Pfoertner_ and _Markus Sigg_, Jul 16 2022