The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A121536 Smallest m such that m^3>=n^2. 3
 1, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 19, 19 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS If n is a cube a(n)=A100196(n), otherwise a(n)=A100196(n)+1. Also, a(n)=(A070923(n)+n^2)^(1/3). LINKS FORMULA a(n)=ceiling(n^(2/3)), n=1,2,... MATHEMATICA Table[Ceiling[n^(2/3)], {n, 1, 100}] CROSSREFS Cf. A070923, A100196. Sequence in context: A202304 A047745 A196176 * A285761 A080405 A039728 Adjacent sequences:  A121533 A121534 A121535 * A121537 A121538 A121539 KEYWORD nonn AUTHOR Zak Seidov, Aug 05 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 29 04:57 EST 2020. Contains 331335 sequences. (Running on oeis4.)