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Search: id:A035771
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| A035771 |
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Coordination sequence for C_34 lattice. |
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+0
1
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| 1, 2312, 892432, 138504984, 11614313504, 613171117352, 22402282117680, 604244840324920, 12614155679414336, 211305268473868616, 2922553486972196432, 34155116258699416408, 343782495750215242848, 3028315702502063596904
(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))^34 if norm is even; otherwise 0.
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CROSSREFS
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Sequence in context: A087978 A020435 A035893 this_sequence A107567 A132214 A133538
Adjacent sequences: A035768 A035769 A035770 this_sequence A035772 A035773 A035774
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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 N. J. A. Sloane (njas(AT)research.att.com).
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