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Search: id:A003047
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| A003047 |
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a(n) = Catalan(n) * Product a(k), k = 0 . . n-1.
(Formerly M1993)
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+0
3
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| 1, 1, 2, 10, 280, 235200, 173859840000, 98238542885683200000000, 32169371027674057560745102540800000000000000000
(list; graph; listen)
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OFFSET
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1,3
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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).
J. W. Moon and M. Sobel, Enumerating a class of nested group testing procedures, J. Combin. Theory, B23 (1977), 184-188.
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CROSSREFS
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Sequence in context: A005154 A074056 A144288 this_sequence A028580 A098706 A143249
Adjacent sequences: A003044 A003045 A003046 this_sequence A003048 A003049 A003050
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KEYWORD
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easy,nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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