0,4

Table of n, a(n) for n=0..79.

a(n) = floor(n^(2/3)). [Charles R Greathouse IV, Mar 21 2012]

Table[ Floor[n^(2/3)], {n, 120}] (* Ray Chandler, Jan 09 2005 *)

(PARI) a(n)=floor(sqrtn(n^2, 3)) \\ Charles R Greathouse IV, Mar 21 2012; corrected by Michel Marcus, Mar 08 2020

(PARI) a(n)=(n^2+.5)^(1/3)\1 \\ More careful rounding. - Charles R Greathouse IV, Mar 21 2012

Cf. A100197.

Sequence in context: A028829 A130855 A235963 * A278078 A094708 A302931

Adjacent sequences: A100193 A100194 A100195 * A100197 A100198 A100199

easy,nonn

Giovanni Teofilatto, Dec 27 2004

Corrected and extended by Ray Chandler, Jan 09 2005

a(0)=0 inserted by Sean A. Irvine, Jun 22 2020

approved