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URL: https://oeis.org/A035747

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A035747
Coordination sequence for C_10 lattice.
3
1, 200, 6800, 97880, 822560, 4780008, 21278640, 77548920, 242080320, 668274440, 1669752016, 3842321560, 8251811680, 16711687720, 32179616240, 59307908024, 105189061760, 180344446280, 300011499280, 485792684760, 767737840032, 1186940456040, 1798737871920
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, Annales de l'institut Fourier, Tome 49 (1999) no. 3, pp. 727-762.
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))^10.
a(n) = A008420(2*n). - Seiichi Manyama, Jun 08 2018
CROSSREFS
Cf. A008420.
Sequence in context: A231803 A185988 A199534 * A219414 A022152 A249238
KEYWORD
nonn,easy
AUTHOR
Joan Serra-Sagrista (jserra(AT)ccd.uab.es)
EXTENSIONS
Recomputed by N. J. A. Sloane, Nov 25 1998
STATUS
approved