A132983 a(n) = ceiling(n^(1/3) + n^(1/4)).

2, 3, 3, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8

Offset: 1

Author

Mohammad K. Azarian, Nov 18 2007

Keywords

• nonn

Links

• G. C. Greubel, Table of n, a(n) for n = 1..5000

Crossrefs

Cf. A000196, A003059, A134914, A134915, A134916.

Programs

Mathematica

Table[Ceiling[Surd[n,3]+Surd[n,4]],{n,80}] (* Harvey P. Dale, May 07 2014 *)

PARI

for(n=1, 50, print1(ceil(n^(1/3) + n^(1/4)), ", ")) \\ G. C. Greubel, Sep 28 2017