

A270714


Decimal expansion of (1/2)^(1/3).


3



7, 9, 3, 7, 0, 0, 5, 2, 5, 9, 8, 4, 0, 9, 9, 7, 3, 7, 3, 7, 5, 8, 5, 2, 8, 1, 9, 6, 3, 6, 1, 5, 4, 1, 3, 0, 1, 9, 5, 7, 4, 6, 6, 6, 3, 9, 4, 9, 9, 2, 6, 5, 0, 4, 9, 0, 4, 1, 4, 2, 8, 8, 0, 9, 1, 2, 6, 0, 8, 2, 5, 2, 8, 1, 2, 1, 0, 9, 5, 8, 6, 6, 3, 6, 7, 7
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OFFSET

0,1


COMMENTS

Let c = (1/2)^(1/3). A sphere of radius c*r has half the volume of a sphere of radius r.  Rick L. Shepherd, Aug 12 2016
Let c = (1/2)^(1/3). The relative maximum of xy(x+y)=1 is (c,1/c^2).  Clark Kimberling, Oct 05 2020


LINKS

Clark Kimberling, Table of n, a(n) for n = 0..10000


FORMULA

Equals 1/A002580 = A002580*A235362 = A005480*A020761. [corrected and expanded by Rick L. Shepherd, Aug 12 2016]
Equals Product_{k>=1} (1 + (1)^k/(3*k+1)).  Amiram Eldar, Aug 10 2020


EXAMPLE

0.79370052598409973737585281963615413019574666394992650490414288091260825...


MATHEMATICA

RealDigits[(1/2)^(1/3), 10, 200][[1]]


PROG

(PARI) (1/2)^(1/3) \\ Altug Alkan, Mar 22 2016


CROSSREFS

Cf. A002580, A005480, A235362, A269993.
Sequence in context: A156000 A019804 A021130 * A010516 A274169 A121168
Adjacent sequences: A270711 A270712 A270713 * A270715 A270716 A270717


KEYWORD

nonn,cons,easy


AUTHOR

Clark Kimberling, Mar 22 2016


STATUS

approved



