0,1

Let c = (1/2)^(1/3). A sphere of radius cr has half the volume of a sphere of radius r. - Rick L. Shepherd, Aug 12 2016

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

Equals 1/A002580 = A002580*A235362 = A005480*A020761.

0.79370052598409973737585281963615413019574666394992650490414288091260825...

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

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

Cf. A002580, A005480, A235362, A269993.

Sequence in context: A156000 A019804 A021130 * A010516 A274169 A121168

Adjacent sequences: A270711 A270712 A270713 * A270715 A270716 A270717

nonn,cons,easy

Clark Kimberling, Mar 22 2016

Formula corrected/expanded by Rick L. Shepherd, Aug 12 2016

approved