%I #8 Jun 19 2013 04:08:30
%S 5,27,141,837,5757,45357,403197,3991677,43545597,518918397,6706022397,
%T 93405311997,1394852659197,22230464255997,376610217983997,
%U 6758061133823997,128047474114559997,2554547108585471997
%N (n+1)!*(n+3)-3.
%F a(n) = A001048(n+2) - 3. - _Michel Marcus_, Jun 19 2013
%e a(2)=27 because 27=(2+1)!*(2+3)-3 or 3*2*1*5-3.
%o (PARI) a(n) = (n+1)!*(n+3) - 3 \\ _Michel Marcus_, Jun 19 2013
%K nonn,easy
%O 1,1
%A Andreas Ulvaer (aulvaer(AT)yahoo.com), Feb 20 2000
%E More terms from _James A. Sellers_, Feb 22 2000