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 A034976 #30 Oct 21 2022 06:58:32
%S A034976 1,16,384,12288,491520,23592960,1321205760,84557168640,6088116142080,
%T A034976 487049291366400,42860337640243200,4114592413463347200,
%U A034976 427917611000188108800,47926772432021068185600,5751212691842528182272000,736155224555843607330816000
%N A034976 One eighth of octo-factorial numbers.
%H A034976 G. C. Greubel, <a href="/A034976/b034976.txt">Table of n, a(n) for n = 1..325</a>
%H A034976 <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>.
%F A034976 8*a(n) = (8*n)!^8 = Product_{j=1..n} 8*j = 8^n*n!.
%F A034976 E.g.f.: (-1+(1-8*x)^(-1))/8.
%F A034976 G.f.: x/(1-16*x/(1-8*x/(1-24*x/(1-16*x/(1-32*x/(1-24*x/(1-40*x/(1-32*x/(1-... (continued fraction). - _Philippe Deléham_, Jan 07 2012
%F A034976 From _Amiram Eldar_, Jan 08 2022: (Start)
%F A034976 Sum_{n>=1} 1/a(n) = 8*(exp(1/8)-1).
%F A034976 Sum_{n>=1} (-1)^(n+1)/a(n) = 8*(1-exp(-1/8)). (End)
%t A034976 Table[8^(n-1)*n!, {n,40}] (* _G. C. Greubel_, Oct 20 2022 *)
%o A034976 (Magma) [8^(n-1)*Factorial(n): n in [1..40]]; // _G. C. Greubel_, Oct 20 2022
%o A034976 (SageMath) [8^(n-1)*factorial(n) for n in range(1,40)] # _G. C. Greubel_, Oct 20 2022
%Y A034976 Cf. A034908, A034909, A034910, A034911, A034912, A034975, A045755, A051189.
%K A034976 easy,nonn
%O A034976 1,2
%A A034976 _Wolfdieter Lang_