login
phi((n!!)!)
0

%I #3 Mar 31 2012 12:38:27

%S 1,1,2,9216,250822656000,

%T 1721860898320750629665025350129266874199532634112000000000000,

%U 127571798940158944523056860801259448502131218787316228449430227816121623349001793754442941084615568218917882938952698416464702214493962240000000000000000000000000000000

%N phi((n!!)!)

%C Next term has 827 digits.

%t Table[EulerPhi[n!!! ],{n,7}]

%K nonn

%O 1,3

%A _Vladimir Joseph Stephan Orlovsky_, Nov 10 2009

%E Corrected by _Charles R Greathouse IV_, Nov 12 2009