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Search: id:A061163
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| A061163 |
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a(n) = (10n)!n!/(5n)!(4n)!(2n)!. |
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+0
4
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| 1, 630, 1385670, 3528923580, 9540949030470, 26651569523959380, 75998432812419471900, 219813190240007470094520, 642409325786050322446410310, 1892390644737640220059489996260
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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According to page 781 of the cited reference the generating function F(x) for a(n) is algebraic but not obviously so and the minimal polynomial satisfied by F(x) is quite large.
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REFERENCES
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M. Kontsevich and D. Zagier, Periods, in Mathematics Unlimited - 2001 and Beyond, Springer, Berlin, 2001, pp. 771-808.
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MAPLE
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A061123 := n->(10*n)!*n!/((5*n)!*(4*n)!*(2*n)!);
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CROSSREFS
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Cf. A061163, A061164.
Adjacent sequences: A061160 A061161 A061162 this_sequence A061164 A061165 A061166
Sequence in context: A098261 A110904 A058832 this_sequence A046856 A045168 A119504
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KEYWORD
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easy,nonn
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AUTHOR
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R. P. Stanley (rstan(AT)math.mit.edu), Apr 17 2001
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 19 2001
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