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Search: id:A035752
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| A035752 |
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Coordination sequence for C_15 lattice. |
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+0
1
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| 1, 450, 34050, 1057730, 18347010, 209070018, 1732242690, 11180805570, 59064045570, 264870794690, 1036722552066, 3618706767810, 11457102844930, 33352168328130, 90257700222210, 229129634462146, 549758831116290
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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R. Bacher, P. de la Harpe and B. Venkov, Series de croissance et series d'Ehrhart associees aux reseaux de racines, C. R. Acad. Sci. Paris, 325 (Series 1) (1997), 1137-1142.
J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.
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LINKS
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J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (Abstract, pdf, ps).
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FORMULA
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((1+x)/(1-x))^15 if norm is even; otherwise 0.
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CROSSREFS
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Adjacent sequences: A035749 A035750 A035751 this_sequence A035753 A035754 A035755
Sequence in context: A093402 A012062 A079659 this_sequence A107548 A020268 A066322
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KEYWORD
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nonn,easy
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AUTHOR
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Serra-Sagrista, Joan; jserra(AT)ccd.uab.es
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EXTENSIONS
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Recomputed Nov 25 1998 by njas.
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