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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, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (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]
Sequence in context: A020820 A111290 A129140 this_sequence A091656 A133508 A125969
Adjacent sequences: A002577 A002578 A002579 this_sequence A002581 A002582 A002583
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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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