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Search: id:A001525
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| A001525 |
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(3n)!/(3!n!).
(Formerly M5320)
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+0
2
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| 1, 60, 10080, 3326400, 1816214400, 1482030950400, 1689515283456000, 2564684200286208000, 5001134190558105600000, 12182762888199545241600000
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
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Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Mar 07 2009: (Start)
Equals A064350/3!, row sums of A157704/3! and row sums of A157705/3!
(End)
Sequence in context: A130214 A146498 A003750 this_sequence A146513 A145411 A113424
Adjacent sequences: A001522 A001523 A001524 this_sequence A001526 A001527 A001528
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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