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Search: id:A161563
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| A161563 |
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Factorials of double factorials. |
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+0
1
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| 1, 1, 2, 6, 40320, 1307674368000, 12413915592536072670862289047373375038521486354677760000000000
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OFFSET
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1,3
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COMMENT
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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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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: A121167 A115658 A005607 this_sequence A135408 A165710 A151995
Adjacent sequences: A161560 A161561 A161562 this_sequence A161564 A161565 A161566
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Jun 13 2009
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EXTENSIONS
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Corrected by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Nov 11 2009
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