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A035769
Coordination sequence for C_32 lattice.
1
1, 2048, 700416, 96376832, 7172939776, 336604997632, 10951050137600, 263584490403840, 4921911787962368, 73937309725313024, 919525887711997952, 9689853217125292032, 88194231555585941504, 704523479193614804992, 5007046793271774990336, 32029123626088983853056
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))^32.
CROSSREFS
Sequence in context: A096963 A234740 A134684 * A107565 A013702 A016751
KEYWORD
nonn,easy
AUTHOR
Joan Serra-Sagrista (jserra(AT)ccd.uab.es)
EXTENSIONS
Recomputed by N. J. A. Sloane, Nov 25 1998
STATUS
approved