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A021002
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Decimal expansion of Zeta(2)*Zeta(3)*Zeta(4)*...
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7
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2, 2, 9, 4, 8, 5, 6, 5, 9, 1, 6, 7, 3, 3, 1, 3, 7, 9, 4, 1, 8, 3, 5, 1, 5, 8, 3, 1, 3, 4, 4, 3, 1, 1, 2, 8, 8, 7, 1, 3, 1, 6, 3, 7, 9, 9, 4, 4, 1, 6, 6, 8, 6, 7, 3, 2, 7, 5, 8, 1, 4, 0, 3, 0, 0, 0, 1, 3, 9, 7, 0, 1, 2, 0, 1, 1, 3, 2, 3, 1, 5, 7, 5, 0, 1, 7, 9, 6, 8, 0, 4, 5, 2, 3, 2, 7, 2, 4, 9, 0, 8, 1, 3, 8, 4
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OFFSET
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1,1
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COMMENTS
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A very good approximation is 2e-Pi=~2.29497100332829723225793155942... - Marco Matosic Nov 16 2005.
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REFERENCES
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S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 40-53.
Felix Fontein and Pawel Wocjan, Quantum Algorithm for Computing the Period Lattice of an Infrastructure, Arxiv preprint arXiv:1111.1348, 2011
F. Fontein and P. Wocjan, On the Probability of Generating a Lattice, arXiv preprint arXiv:1211.6246, 2012. - From N. J. A. Sloane, Jan 03 2013
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LINKS
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Table of n, a(n) for n=1..105.
S. R. Finch, Apery's Constant
Bernd C. Kellner, On asymptotic constants related to products of Bernoulli numbers and factorials, arXiv:math/0604505.
Eric Weisstein's World of Mathematics, Abelian Group
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FORMULA
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Product of A080729 and A080730. - R. J. Mathar, Feb 16 2011
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EXAMPLE
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2.2948565916733137941835158313443112887131637994416686732758140300...
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MAPLE
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Digits := 256; product(Zeta(1.0*n), n=2..1000);
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MATHEMATICA
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p = Product[ N[ Zeta[n], 256], {n, 2, 104}]; RealDigits[p, 10, 111][[1]] (* Robert G. Wilson v *)
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CROSSREFS
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Cf. A002117.
Sequence in context: A021440 A157216 A020776 * A103710 A178236 A093589
Adjacent sequences: A020999 A021000 A021001 * A021003 A021004 A021005
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KEYWORD
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cons,nonn
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AUTHOR
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Andre Neumann Kauffman (ank(AT)nlink.com.br)
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EXTENSIONS
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More terms from Simon Plouffe, Jan 07 2002
Further terms from Robert G. Wilson v, Nov 22 2005
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STATUS
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approved
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