A070930 Smallest integer >= 0 of the form x^3 - n^4.

0, 11, 44, 87, 104, 35, 343, 0, 298, 648, 984, 1216, 1230, 888, 28, 3385, 1663, 5616, 2330, 6375, 631, 4072, 7655, 11224, 14599, 17576, 0, 21400, 21719, 20584, 17671, 12632, 5095, 31295, 20250, 5543, 32463, 12016, 39196, 11353, 37527, 440, 24150

Offset: 1

Author

Benoit Cloitre, May 20 2002

Keywords

• easy
• nonn

Comments

a(n)=0 if n is a cube.

Crossrefs

Cf. A068527.

Programs

Mathematica

Array[Ceiling[#^(4/3)]^3-#^4&,50] (* Harvey P. Dale, Dec 24 2015 *)

PARI

for(n=1,100,print1(ceil(n^(4/3))^3-n^4,","))

Formula

a(n) = ceiling(n^(4/3))^3 - n^4.