A069136 Numbers that are not the sum of 5 nonnegative cubes.

6, 7, 13, 14, 15, 20, 21, 22, 23, 34, 39, 41, 42, 46, 47, 48, 49, 50, 53, 58, 60, 61, 69, 76, 77, 79, 84, 85, 86, 87, 95, 98, 102, 103, 104, 105, 106, 110, 111, 112, 113, 114, 117, 121, 122, 123, 124, 132, 139, 140, 147, 148, 151, 158, 159, 165

Offset

1,1

Comments

Sequence is conjectured to be finite.

Comment from Richard C. Schroeppel, Sep 22 2010: It is conjectured that 7373170279850 is the largest number requiring more than four cubes (see Deshouillers et al.).

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

T. D. Noe, Table of n, a(n) for n=1..4060

Jean-Marc Deshouillers, Francois Hennecart and Bernard Landreau; appendix by I. Gusti Putu Purnaba, 7373170279850, Math. Comp. 69 (2000), 421-439.

Index entries for sequences related to sums of cubes

Crossrefs

Sums of k cubes, number of ways of writing n as, for k=1..9: A010057, A173677, A051343, A173678, A173679, A173680, A173676, A173681, A173682.

Sequence in context: A109605 A331860 A069198 * A348368 A277137 A047335

Adjacent sequences: A069133 A069134 A069135 * A069137 A069138 A069139

Keyword

nonn

Author

N. J. A. Sloane, Apr 08 2002

Status

approved