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 A064378 #12 Aug 10 2022 09:46:43
%S A064378 2,4,8,32,192,1536,15360,184320,2580480,41287680,743178240,
%T A064378 14863564800,326998425600,7847962214400,204047017574400,
%U A064378 5713316492083200,171399494762496000,5484783832399872000,186482650301595648000,6713375410857443328000
%N A064378 a(0) = 2, a(n) = 2^(n+1)*(n-1)! (n >= 1).
%F A064378 E.g.f.: 2-2*log(1-2x).
%t A064378 Join[{2},Table[2^(n+1) (n-1)!,{n,20}]] (* _Harvey P. Dale_, Mar 12 2013 *)
%Y A064378 Cf. A032184.
%K A064378 nonn
%O A064378 0,1
%A A064378 Anonymous, Sep 27 2001