A003074 Number of different numbers <= n that are sums of 3 positive cubes.

0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14

Offset

1,10

References

H. Davenport, Sums of three positive cubes, J. London Math. Soc., 25 (1950), 339-343. Coll. Works III p. 999.

Links

Table of n, a(n) for n=1..93.

Mathematica

Accumulate[Table[If[Length[Select[PowersRepresentations[n, 3, 3], FreeQ[ #, 0]&]]>0, 1, 0], {n, 100}]] (* Harvey P. Dale, Sep 14 2020 *)

Crossrefs

Cf. A003072.

Sequence in context: A054896 A052364 A052374 * A279222 A276798 A067100

Adjacent sequences: A003071 A003072 A003073 * A003075 A003076 A003077

Keyword

nonn

Author

N. J. A. Sloane, David W. Wilson

Status

approved