A035766 Coordination sequence for C_29 lattice.

1, 1682, 472642, 53502738, 3282606338, 127340157970, 3436393752642, 68877486633362, 1075699009872898, 13578251928347538, 142587780541697090, 1275090380987298322, 9898196852553376002, 67777017312848420114, 414943777163837465154, 2297612922779800904850

Offset

0,2

Links

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

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))^29.

Crossrefs

Sequence in context: A156175 A031760 A204568 * A107562 A031539 A205739

Adjacent sequences: A035763 A035764 A035765 * A035767 A035768 A035769

Keyword

nonn,easy

Author

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

Extensions

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

Status

approved