This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A033187 #23 Dec 29 2022 12:09:15 %S A033187 1,1,1,120,25852016738884976640000 %N A033187 a(n) = (n!)!/n!. %C A033187 The next two terms have 197 and 1744 decimal digits, respectively. %C A033187 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 A033187 <a href="/index/Di#divseq">Index to divisibility sequences</a> %H A033187 <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a> %F A033187 a(n) = (n!-1)!. %F A033187 a(n) = A000197(n)/n!. %o A033187 (PARI) a(n)=(n!-1)! \\ _R. J. Cano_, Jan 23 2013 %Y A033187 Cf. A000142, A000197, A010050. %K A033187 nonn,easy %O A033187 0,4 %A A033187 Ken Alverson (KenA(AT)tso.cin.ix.ne) %E A033187 Corrections made by _Eric M. Schmidt_, Jan 23 2013