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.
CROSSREFS
KEYWORD
nonn
AUTHOR
R. J. Mathar, Apr 24 2010
STATUS
approved