A025447 Number of partitions of n into 3 nonnegative cubes.

1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0

Offset

0,217

Links

Charles R Greathouse IV, Table of n, a(n) for n = 0..10000

Prog

(PARI) a(n)=sum(a=0, sqrtnint(n, 3), sum(b=0, a, my(C=n-a^3-b^3, c); ispower(C, 3, &c) && 0 <= c && c <= b)) \\ Charles R Greathouse IV, Jun 26 2013
(PARI) a(n)=sum(a=0, sqrtnint(n, 3), my(a3=a^3, c); sum(b=0, min(a, sqrtnint(n-a3, 3)), ispower(n-a3-b^3, 3, &c) && c <= b)) \\ Charles R Greathouse IV, Sep 16 2016

Crossrefs

Sequence in context: A329678 A359942 A266434 * A131078 A302203 A130657

Adjacent sequences: A025444 A025445 A025446 * A025448 A025449 A025450

Keyword

nonn

Author

David W. Wilson

Status

approved