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A085532 (2n)^(n+1). 2

%I #10 Feb 08 2015 18:15:03

%S 0,4,64,1296,32768,1000000,35831808,1475789056,68719476736,

%T 3570467226624,204800000000000,12855002631049216,876488338465357824,

%U 64509974703297150976,5097655355238390956032,430467210000000000000000,38685626227668133590597632

%N (2n)^(n+1).

%p a:=n->mul(2*sum(1, j=2..n+1), k=1..n+1): seq(a(n), n=0..17); # _Zerinvary Lajos_, Jan 01 2009

%t Table[(2n)^(n+1),{n,0,20}] (* _Harvey P. Dale_, May 03 2011 *)

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Jul 05 2003

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Last modified March 29 02:22 EDT 2024. Contains 371264 sequences. (Running on oeis4.)