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A161563
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Factorials of double factorials.
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1
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OFFSET
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1,3
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COMMENTS
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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!!!.
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LINKS
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Table of n, a(n) for n=1..7.
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MATHEMATICA
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lst={}; Do[AppendTo[lst, n!!! ], {n, 0, 9}]; lst
(* alternately *) Array[ #!!!&, 9, 0]
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CROSSREFS
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Sequence in context: A337096 A005607 A184391 * A135408 A165710 A151995
Adjacent sequences: A161560 A161561 A161562 * A161564 A161565 A161566
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, Jun 13 2009
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EXTENSIONS
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Corrected by Charles R Greathouse IV, Nov 11 2009
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STATUS
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approved
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