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%I #5 Jan 12 2022 11:35:37
%S 1,1,2,6,40320,1307674368000,
%T 12413915592536072670862289047373375038521486354677760000000000
%N Factorials of double factorials.
%C As of version 7, Mathematica parses n!!! as (n!!)!. This sequence is not to be confused with the triple factorials A007661 or A161474 which are usually denoted n!!!.
%t lst={};Do[AppendTo[lst,n!!! ],{n,0,9}];lst
%t (* alternately *) Array[ #!!!&,9,0]
%K nonn
%O 0,3
%A _Vladimir Joseph Stephan Orlovsky_, Jun 13 2009
%E Corrected by _Charles R Greathouse IV_, Nov 11 2009
%E Offset set to 0 by _Alois P. Heinz_, Jan 12 2022
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