VOOZH about

URL: https://oeis.org/A069137

⇱ A069137 - OEIS

login
A069137
Numbers which are sums of neither 1, 2, 3, 4, 5 or 6 nonnegative cubes.
3
7, 14, 15, 21, 22, 23, 42, 47, 49, 50, 61, 77, 85, 87, 103, 106, 111, 112, 113, 114, 122, 140, 148, 159, 166, 167, 174, 175, 178, 185, 186, 204, 211, 212, 223, 229, 230, 231, 237, 238, 239, 276, 292, 295, 300, 302, 303, 311, 327, 329, 337, 340, 356, 363, 364
OFFSET
1,1
COMMENTS
Sequence is conjectured to be finite.
REFERENCES
Bohman, Jan and Froberg, Carl-Erik; Numerical investigation of Waring's problem for cubes, Nordisk Tidskr. Informationsbehandling (BIT) 21 (1981), 118-122.
F. Romani, Computations concerning Waring's problem, Calcolo, 19 (1982), 415-431.
LINKS
Jean-Marc Deshouillers, Francois Hennecart and Bernard Landreau; appendix by I. Gusti Putu Purnaba, 7373170279850, Math. Comp. 69 (2000), 421-439.
FORMULA
Natural numbers remaining if union of A003325, A003072, A003327, A003328, A003329 and A000578 sets were deleted. Remark: this sequence itself does not include cubes, in contrast to A085334.
EXAMPLE
Numbers which need at least seven terms to represent them as a sum of positive cubes: 14=8+1+1+1+1+1+1.
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 08 2002; edited Sep 15 2006
STATUS
approved