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Search: id:A035747
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| A035747 |
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Coordination sequence for C_10 lattice. |
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+0
2
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| 1, 200, 6800, 97880, 822560, 4780008, 21278640, 77548920, 242080320, 668274440, 1669752016, 3842321560, 8251811680, 16711687720, 32179616240, 59307908024, 105189061760, 180344446280, 300011499280
(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))^10 if norm is even; otherwise 0.
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CROSSREFS
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Adjacent sequences: A035744 A035745 A035746 this_sequence A035748 A035749 A035750
Sequence in context: A117412 A109632 A129641 this_sequence A022152 A035835 A027825
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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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