A057904 - OEIS

A057904

Positive integers that are not the sum of exactly three positive cubes.

1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 63, 64, 65, 67, 68, 69, 70, 71, 72, 74, 75, 76, 77, 78, 79, 82, 83, 84

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

A025456(a(n)) = 0. [From Reinhard Zumkeller, Apr 23 2009]

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

Eric Weisstein's World of Mathematics, Cubic Number.

MATHEMATICA

Select[Range[100], Count[ PowersRepresentations[#, 3, 3], pr_List /; FreeQ[pr, 0]] == 0 &] (* Jean-François Alcover, Oct 31 2012 *)

CROSSREFS

Cf. A003072 (Complement)