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Search: id:A035774
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| A035774 |
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Coordination sequence for C_37 lattice. |
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+0
1
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| 1, 2738, 1251266, 229731890, 22759419650, 1417045988658, 60920563283394, 1928517866520498, 47112663470291970, 920606667020062130, 14802580485176160706, 200402916980183383858, 2328223393508202424066
(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))^37 if norm is even; otherwise 0.
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CROSSREFS
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Adjacent sequences: A035771 A035772 A035773 this_sequence A035775 A035776 A035777
Sequence in context: A045155 A122473 A094401 this_sequence A107570 A094497 A114768
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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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