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%I #44 Sep 08 2022 08:46:16
%S 1,1,1,4,8,96,192,2304,13824,207360,829440,24883200,99532800,
%T 2786918400,31352832000,501645312000,4013162496000,192631799808000,
%U 1155790798848000,52010585948160000,728148203274240000,19223112566439936000,192231125664399360000
%N a(n) = phi(n!)/phi(n).
%H Robert Israel, <a href="/A273060/b273060.txt">Table of n, a(n) for n = 1..450</a>
%F a(n) = A048855(n)/A000010(n). - _Michel Marcus_, Oct 30 2016
%p seq(numtheory:-phi(n!)/numtheory:-phi(n), n=1..50); # _Robert Israel_, Nov 13 2016
%t Table[EulerPhi[n!]/EulerPhi[n], {n,1,25}] (* _G. C. Greubel_, Oct 30 2016 *)
%o (Magma) [EulerPhi(Factorial(n)) div EulerPhi(n): n in [1..25]]; // _Vincenzo Librandi_, Oct 30 2016
%o (PARI) a(n) = eulerphi(n!)/eulerphi(n); \\ _Michel Marcus_, Oct 30 2016
%Y Cf. A000010, A048855.
%K nonn
%O 1,4
%A _Alexander R. Povolotsky_, Oct 29 2016
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