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A035760 Coordination sequence for C_23 lattice. 1
1, 1058, 187266, 13408034, 523804162, 13053926690, 228751366018, 3013639296546, 31343842260994, 267120108528162, 1920511723360130, 11923933134635298, 65157237071384066, 318308216281781026, 1408463692886754178, 5707273421568956450, 21377026411532247042, 74604432883744337954 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

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.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..10000

J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (pdf).

FORMULA

a(n) = [x^(2n)] ((1+x)/(1-x))^23.

CROSSREFS

Sequence in context: A120215 A202611 A253678 * A107556 A237797 A237795

Adjacent sequences:  A035757 A035758 A035759 * A035761 A035762 A035763

KEYWORD

nonn,easy

AUTHOR

Joan Serra-Sagrista (jserra(AT)ccd.uab.es)

EXTENSIONS

Recomputed by N. J. A. Sloane, Nov 25 1998

STATUS

approved

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Last modified December 6 13:45 EST 2021. Contains 349563 sequences. (Running on oeis4.)