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A035768 Coordination sequence for C_31 lattice. 1

%I

%S 1,1922,616962,79711106,5573863426,245955974018,7532156369410,

%T 170856126160770,3010714725097474,42741155411865474,

%U 503090409749666306,5025399107633316738,43425584300428732418,329863641871506905986,2232693297068905613826,13622726261084045211522

%N Coordination sequence for C_31 lattice.

%D 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.

%D J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.

%H Seiichi Manyama, <a href="/A035768/b035768.txt">Table of n, a(n) for n = 0..10000</a>

%H J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (<a href="http://neilsloane.com/doc/Me220.pdf">pdf</a>).

%F a(n) = [x^(2n)] ((1+x)/(1-x))^31.

%K nonn,easy

%O 0,2

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

%E Recomputed by _N. J. A. Sloane_, Nov 25 1998

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Last modified October 25 13:09 EDT 2021. Contains 348251 sequences. (Running on oeis4.)