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A055416
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Number of points in Z^10 of norm <= n.
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0
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1, 21, 4541, 198765, 3083569, 27634481, 164379601, 759891589, 2839094517, 9183188589, 26107328109, 67602028569, 160441685209, 357086356401, 746545031221, 1487788785845, 2829595966381, 5188248484757, 9170828884817
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Here "norm" is being used in the sense of L_2 norm, as opposed to the definition in SPLAG. - N. J. A. Sloane (njas(AT)research.att.com), Sep 29 2007
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REFERENCES
| J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag.
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EXAMPLE
| To check that a(2) = 4541:
norm^2 # total
0 1 1
1 20 21
2 180 201
3 960 1161
4 3380 4541
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CROSSREFS
| Sequence in context: A202980 A153833 A200998 * A203370 A074053 A028451
Adjacent sequences: A055413 A055414 A055415 * A055417 A055418 A055419
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 29 2007
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