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 A344247 #5 May 13 2021 13:48:22
%S A344247 1,3,9,33,81,270,729,2278,6606,19926,59049,178173,531441,1596510,
%T A344247 4783698,14356023,43046721,129162168,387420489,1162323189,3486790962,
%U A344247 10460530350,31381059609,94143738789,282429539802,847290203766,2541865887543,7625602292013,22876792454961,68630391912807
%N A344247 Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(3^(k-1)).
%Y A344247 Cf. A001055, A050367, A329800, A344248, A344249, A344250, A344251, A344252, A344253.
%K A344247 nonn
%O A344247 1,2
%A A344247 _Ilya Gutkovskiy_, May 12 2021