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A091925
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Decimal expansion of pi^3.
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18
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3, 1, 0, 0, 6, 2, 7, 6, 6, 8, 0, 2, 9, 9, 8, 2, 0, 1, 7, 5, 4, 7, 6, 3, 1, 5, 0, 6, 7, 1, 0, 1, 3, 9, 5, 2, 0, 2, 2, 2, 5, 2, 8, 8, 5, 6, 5, 8, 8, 5, 1, 0, 7, 6, 9, 4, 1, 4, 4, 5, 3, 8, 1, 0, 3, 8, 0, 6, 3, 9, 4, 9, 1, 7, 4, 6, 5, 7, 0, 6, 0, 3, 7, 5, 6, 6, 7, 0, 1, 0, 3, 2, 6, 0, 2, 8, 8, 6, 1, 9
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n = 2..20000
G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 31
Khodabakhsh Hessami Pilehrood, Tatiana Hessami Pilehrood, Series acceleration formulas for beta values, Discrete Mathematics & Theoretical Computer Science 12:2 (2010), pp. 223-236.
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FORMULA
| Sum_{k=0,1,...} binom(2k,k)/((2k+1)^3*16^k) = 7*pi^3/216. (Kh. Hessami Pilehrood and T. Hessami Pilehrood).
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EXAMPLE
| 31.00627668029982017547631506710139520222528856588510769414453810380639...
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PROG
| (PARI) { default(realprecision, 20080); x=Pi^3/10; for (n=2, 20000, d=floor(x); x=(x-d)*10; write("b091925.txt", n, " ", d)); } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 22 2009]
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CROSSREFS
| Cf. A000796, A002388, A058285 (continued fraction).
Sequence in context: A115090 A112295 A110517 * A034370 A144402 A186170
Adjacent sequences: A091922 A091923 A091924 * A091926 A091927 A091928
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KEYWORD
| easy,nonn,cons
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AUTHOR
| Mohammad K. Azarian (azarian(AT)evansville.edu), Mar 16 2004
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