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2*(prime(n)-2)!.
0

%I #3 Mar 30 2012 18:49:45

%S 2,2,12,240,725760,79833600,2615348736000,711374856192000,

%T 102181884343418880000,21777738900836704321536000000,

%U 17683523987479403909087232000000

%N 2*(prime(n)-2)!.

%t Table[2*(Prime[n] - 2)!, {n, 1, 23}]

%K easy,nonn

%O 1,1

%A _Giovanni Teofilatto_, Jul 03 2007

%E Edited and extended by _Stefan Steinerberger_, Jul 13 2007