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Search: id:A100513
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| A100513 |
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Denominator of Sum_{k=0..n} 1/C(2n,2k). |
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+0
5
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| 1, 1, 6, 15, 35, 315, 13860, 3003, 9009, 765765, 1385670, 14549535, 66927861, 371821450, 40156716600, 145568097675, 136745788725, 128931743655, 9025222055850, 4281195077775, 166966608033225, 6845630929362225, 26165522663340060, 294362129962575675
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OFFSET
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0,3
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REFERENCES
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M. Klamkin, ed., Problems in Applied Mathematics: Selections from SIAM Review, SIAM, 1990; see pp. 126-127.
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EXAMPLE
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1, 2, 13/6, 32/15, 73/35, 647/315, 28211/13860, 6080/3003, 18181/9009, 1542158/765765, 2786599/1385670, 29229544/14549535, 134354573/66927861, ... = A100512/A100513.
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CROSSREFS
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Cf. A100512, A046825.
Sequence in context: A006094 A099620 A045969 this_sequence A127469 A103106 A074132
Adjacent sequences: A100510 A100511 A100512 this_sequence A100514 A100515 A100516
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KEYWORD
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nonn,frac
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 25 2004
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