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 A344251 #5 May 13 2021 13:48:51
%S A344251 1,7,49,371,2401,17150,117649,826028,5766026,40370414,282475249,
%T A344251 1977462571,13841287201,96889833950,678223190498,4747567343554,
%U A344251 33232930569601,232630555172932,1628413597910449,11398895468739163,79792266303376802,558545866060610750
%N A344251 Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(7^(k-1)).
%Y A344251 Cf. A001055, A050367, A329800, A344247, A344248, A344249, A344250, A344252, A344253.
%K A344251 nonn
%O A344251 1,2
%A A344251 _Ilya Gutkovskiy_, May 12 2021