A073091 Number of ways to express n as (x^3+y^3+z^3)/(x+y+z) 1<=x<=y<=z<=n.

1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 2, 0, 0, 0, 0, 2, 1, 1, 1, 0, 0, 0, 0, 1, 2, 0, 1, 0, 0, 0, 2, 0, 1, 2, 0, 1, 0, 1, 0, 2, 0, 0, 1, 2, 1, 1, 0, 0, 3, 0, 2, 0, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 0, 3, 0, 1, 2, 1, 2, 0, 1, 1, 0, 0, 0, 3, 0, 0, 2, 0, 2, 1, 1, 0, 2, 2, 0, 0, 1, 1, 0, 0, 0, 2, 0, 1, 0, 0, 3, 3

Offset

1,11

Links

Table of n, a(n) for n=1..100.

Prog

(PARI) a(n)=sum(x=1, n, sum(y=1, x, sum(z=1, y, if((x^3+y^3+z^3)/(x+y+z)-n, 0, 1))))

Crossrefs

Sequence in context: A051907 A178176 A093569 * A125250 A048113 A028961

Adjacent sequences: A073088 A073089 A073090 * A073092 A073093 A073094

Keyword

easy,nonn

Author

Benoit Cloitre, Aug 18 2002

Status

approved