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A035766
Coordination sequence for C_29 lattice.
1
1, 1682, 472642, 53502738, 3282606338, 127340157970, 3436393752642, 68877486633362, 1075699009872898, 13578251928347538, 142587780541697090, 1275090380987298322, 9898196852553376002, 67777017312848420114, 414943777163837465154, 2297612922779800904850
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))^29.
CROSSREFS
Sequence in context: A156175 A031760 A204568 * A107562 A031539 A205739
KEYWORD
nonn,easy
AUTHOR
Joan Serra-Sagrista (jserra(AT)ccd.uab.es)
EXTENSIONS
Recomputed by N. J. A. Sloane, Nov 25 1998
STATUS
approved