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Search: id:A002580
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| A002580 |
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Decimal expansion of cube root of 2.
(Formerly M1354 N0521)
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+0
6
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| 1, 2, 5, 9, 9, 2, 1, 0, 4, 9, 8, 9, 4, 8, 7, 3, 1, 6, 4, 7, 6, 7, 2, 1, 0, 6, 0, 7, 2, 7, 8, 2, 2, 8, 3, 5, 0, 5, 7, 0, 2, 5, 1, 4, 6, 4, 7, 0, 1, 5, 0, 7, 9, 8, 0, 0, 8, 1, 9, 7, 5, 1, 1, 2, 1, 5, 5, 2, 9, 9, 6, 7, 6, 5, 1, 3, 9, 5, 9, 4, 8, 3, 7, 2, 9, 3, 9, 6, 5, 6, 2, 4, 3, 6, 2, 5, 5, 0, 9, 4, 1, 5, 4, 3, 1, 0, 2, 5
(list; cons; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
Uhler, Horace S.; Many-figure approximations for $\root 3\of 2$, $\root 3\of 3$, $\root 3\of 4$ and $\root 3\of 9$ with $\chi\sp 2$ data. Scripta Math. 18, (1952). 173-176.
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,20000
S. Plouffe, Plouffe's Inverter, The cube root of 2 to 20000 digits
S. Plouffe, 2**(1/3) to 2000 places
Eric Weisstein's World of Mathematics, Delian Constant
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EXAMPLE
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1.2599210498948731647672106072782283505702514...
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MATHEMATICA
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RealDigits[N[2^(1/3), 5! ]] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 04 2008]
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PROGRAM
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(PARI) { default(realprecision, 20080); x=2^(1/3); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b002580.txt", n, " ", d)); } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 07 2009]
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CROSSREFS
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Cf. A002945 = Continued fraction. [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 07 2009]
Adjacent sequences: A002577 A002578 A002579 this_sequence A002581 A002582 A002583
Sequence in context: A020820 A111290 A129140 this_sequence A091656 A133508 A125969
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KEYWORD
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nonn,cons
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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Fixed my PARI program, had -n Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 19 2009
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