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A131705 Phi(binomial(2*n,n)*n^3). 0

%I

%S 0,1,16,144,1536,7200,51840,282240,1474560,7464960,55296000,200724480,

%T 1051066368,6167715840,21459271680,114960384000,523197480960,

%U 2214903398400,9311791104000,41500698624000,183936614400000

%N Phi(binomial(2*n,n)*n^3).

%p with(numtheory):with(combinat):a:=n->phi(binomial(2*n,n)*n^3): seq(a(n), n=0..22);

%t Table[EulerPhi[Binomial[2n,n]n^3],{n,0,20}] (* _Harvey P. Dale_, May 10 2015 *)

%Y Cf. A005429.

%K nonn

%O 0,3

%A _Zerinvary Lajos_, Oct 07 2007

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Last modified May 20 20:15 EDT 2022. Contains 353876 sequences. (Running on oeis4.)