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%I #23 Dec 29 2022 12:09:15
%S 1,1,1,120,25852016738884976640000
%N a(n) = (n!)!/n!.
%C The next two terms have 197 and 1744 decimal digits, respectively.
%C a(n) gives the number of different ways in which a table of permutations for n objects can be arranged when one of them is fixed at the same place. Also: some of the first terms in this sequence belong to A010050. - _R. J. Cano_, Jan 23 2013
%H <a href="/index/Di#divseq">Index to divisibility sequences</a>
%H <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>
%F a(n) = (n!-1)!.
%F a(n) = A000197(n)/n!.
%o (PARI) a(n)=(n!-1)! \\ _R. J. Cano_, Jan 23 2013
%Y Cf. A000142, A000197, A010050.
%K nonn,easy
%O 0,4
%A Ken Alverson (KenA(AT)tso.cin.ix.ne)
%E Corrections made by _Eric M. Schmidt_, Jan 23 2013
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