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A046895 Sizes of successive clusters in Z^4 lattice. +0
3
1, 9, 33, 65, 89, 137, 233, 297, 321, 425, 569, 665, 761, 873, 1065, 1257, 1281, 1425, 1737, 1897, 2041, 2297, 2585, 2777, 2873, 3121, 3457, 3777, 3969, 4209, 4785, 5041, 5065, 5449, 5881, 6265, 6577, 6881, 7361, 7809, 7953, 8289, 9057 (list; graph; listen)
OFFSET

0,2

COMMENT

Number of lattice points inside or on the 4-sphere x^2+y^2+z^2+u^2=n. - T. D. Noe, Mar 14 2009

LINKS

T. D. Noe, Table of n, a(n) for n=0..1000

CROSSREFS

Partial sums of A000118.

Cf. A117609

Sequence in context: A075812 A146262 A161430 this_sequence A165392 A145923 A092562

Adjacent sequences: A046892 A046893 A046894 this_sequence A046896 A046897 A046898

KEYWORD

nonn,easy,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.


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