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A035783
Coordination sequence for C_46 lattice.
1
1, 4232, 2987792, 846141848, 128975126048, 12312430500520, 808072815510832, 38851092934042552, 1433080081936088128, 42010353222033261768, 1006338265202317013840, 20147944043360020434392, 343501351713019455781472
OFFSET
0,2
LINKS
R. Bacher, P. de la Harpe and B. Venkov, Séries de croissance et séries d'Ehrhart associées aux réseaux de racines, C. R. Acad. Sci. Paris, 325 (Series 1) (1997), 1137-1142.
J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (pdf).
Joan Serra-Sagrista, Enumeration of lattice points in l_1 norm, Inf. Proc. Lett. 76 (1-2) (2000) 39-44.
FORMULA
a(n) = [x^(2n)] ((1+x)/(1-x))^46.
CROSSREFS
Cf. A035741.
Sequence in context: A345837 A210092 A035899 * A108007 A254880 A184684
KEYWORD
nonn,easy
AUTHOR
Joan Serra-Sagrista (jserra(AT)ccd.uab.es)
EXTENSIONS
Recomputed by N. J. A. Sloane, Nov 25 1998
STATUS
approved