A175369 - OEIS

A175369

Partial sums of A175368.

1, 9, 33, 65, 81, 81, 81, 81, 89, 137, 233, 297, 297, 297, 297, 297, 321, 417, 513, 513, 513, 513, 513, 513, 545, 609, 609, 617, 665, 761, 825, 825, 841, 841, 841, 889, 1081, 1273, 1273, 1273, 1273, 1273, 1273, 1369, 1561, 1561, 1561, 1561, 1561, 1561, 1561

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OFFSET

0,2

COMMENTS

Number of integer 4-tuples (x,y,z,u) satisfying |x|^3+|y|^3+|z|^3+|u|^3 <= n, -n <= x,y,z,u <= n. A variant of A046895 with cubes instead of squares.

LINKS

Table of n, a(n) for n=0..50.

CROSSREFS

Sequence in context: A256868 A146262 A161430 * A046895 A165392 A145923

Adjacent sequences: A175366 A175367 A175368 * A175370 A175371 A175372

KEYWORD

nonn

AUTHOR

R. J. Mathar, Apr 24 2010

STATUS

approved