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 A334605 #23 May 07 2020 22:14:40
%S A334605 1,64,46656,2985984,46656000000,5184000000,609892416000000,
%T A334605 39033114624000000,256096265048064000000,256096265048064000000,
%U A334605 453690155404813307904000000,453690155404813307904000000,2189875725319351517910798336000000
%N A334605 Denominator of Sum_{k=1..n} (-1)^(k+1)/k^6.
%C A334605 Lim_{n -> infinity} A136677(n)/a(n) = A275703 = (31/32)*A013664.
%e A334605 The first few fractions are: 1, 63/64, 45991/46656, 2942695/2985984, 45982595359/46656000000, 5109066151/5184000000, ... = A136677/A334605.
%t A334605 Denominator @ Accumulate[Table[(-1)^(k + 1)/k^6, {k, 1, 13}]] (* _Amiram Eldar_, May 07 2020 *)
%o A334605 (PARI) a(n) = denominator(sum(k=1, n, (-1)^(k+1)/k^6)); \\ _Michel Marcus_, May 07 2020
%Y A334605 Cf. A013664, A136677 (numerators), A275703.
%K A334605 nonn,frac
%O A334605 1,2
%A A334605 _Petros Hadjicostas_, May 07 2020