0,4

G. C. Greubel, Table of n, a(n) for n = 0..1000

a(n) = n - A048762(n) = n - floor(n^(1/3))^3.

a(n) < 3*n^(2/3) for n > 0. - Charles R Greathouse IV, Sep 02 2015

a(12) = 4 because 2^3 <= 12 < 3^3 and 12 - 2^3 = 4.

A055400 := proc(n)

n-A048762(n) ;

end proc:

seq(A055400(n), n=0..80) ; # R. J. Mathar, Nov 06 2011

Array[#-Floor[Power[#, (3)^-1]]^3&, 90, 0] (* Harvey P. Dale, Jan 18 2012 *)

(PARI) a(n)=n-sqrtnint(n, 3)^3 \\ Charles R Greathouse IV, Sep 02 2015

Cf. A048762, A053186, A055401.

Sequence in context: A031007 A010876 A309958 * A257847 A194757 A070553

Adjacent sequences: A055397 A055398 A055399 * A055401 A055402 A055403

easy,nonn

Henry Bottomley, May 16 2000

approved