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A007685
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Product C(2k,k), k = 1..n.
(Formerly M2047)
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1
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1, 2, 12, 240, 16800, 4233600, 3911846400, 13425456844800, 172785629592576000, 8400837310791045120000, 1552105098192510332190720000, 1094904603628138948657963991040000, 2960792853328653706847125274154762240000, 30794022150329995743434211126374020153344000000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| H. W. Gould, A class of binomial sums and a series transformation, Utilitas Math., 45 (1994), 71-83.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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MAPLE
| [seq(mul(binomial(2*k, k), k=1..n), n=0..16)];
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CROSSREFS
| Sequence in context: A119700 A141083 A132877 * A132987 A111403 A007986
Adjacent sequences: A007682 A007683 A007684 * A007686 A007687 A007688
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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