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a(n) = n! + n^2 + n.
2

%I #12 Sep 14 2021 19:58:41

%S 1,3,8,18,44,150,762,5096,40392,362970,3628910,39916932,479001756,

%T 6227020982,87178291410,1307674368240,20922789888272,355687428096306,

%U 6402373705728342,121645100408832380,2432902008176640420,51090942171709440462,1124000727777607680506

%N a(n) = n! + n^2 + n.

%H Harry J. Smith, <a href="/A066143/b066143.txt">Table of n, a(n) for n = 0..100</a>

%t Table[n!+n^2+n,{n,0,30}] (* _Harvey P. Dale_, Sep 14 2021 *)

%o (PARI) { for (n=0, 100, write("b066143.txt", n, " ", n! + n^2 + n) ) } \\ _Harry J. Smith_, Feb 02 2010

%K easy,nonn

%O 0,2

%A _George E. Antoniou_, Dec 07 2001