



1, 9, 81, 137, 321, 609, 1081, 1561, 2137, 3193, 4393, 4889, 6617, 8425, 9529, 11905, 14169, 17097, 18953, 21953, 25105, 29177, 32681, 35937, 41105, 46321, 50529, 55217, 62177, 67665, 74849, 80817, 87185, 96449, 104945, 112609, 120881, 130137
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OFFSET

0,2


COMMENTS

Number of integer 4tuples (x,y,z,u) satisfying x^3+y^3+z^3+u^3 <= n^2, n <= x,y,z <= n. If the cubes were replaced by squares, A055410 would result.


LINKS

Table of n, a(n) for n=0..37.


CROSSREFS

Sequence in context: A207689 A209225 A208502 * A207695 A158028 A207591
Adjacent sequences: A175367 A175368 A175369 * A175371 A175372 A175373


KEYWORD

nonn


AUTHOR

R. J. Mathar, Apr 24 2010


STATUS

approved



