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%I #23 Jul 02 2018 01:47:20
%S 1,2888,1392016,269493720,28142347040,1846012202088,83558656596144,
%T 2782948528883448,71467464065517120,1466676453767667080,
%U 24743395759941243856,351105989545855146008,4270772766808101054816
%N Coordination sequence for C_38 lattice.
%H Muniru A Asiru, <a href="/A035775/b035775.txt">Table of n, a(n) for n = 0..250</a>
%H R. Bacher, P. de la Harpe and B. Venkov, <a href="https://doi.org/10.1016/S0764-4442(97)83542-2">Séries de croissance et séries d'Ehrhart associées aux réseaux de racines</a>, C. R. Acad. Sci. Paris, 325 (Series 1) (1997), 1137-1142.
%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>).
%H Joan Serra-Sagrista, <a href="http://dx.doi.org/10.1016/S0020-0190(00)00119-8">Enumeration of lattice points in l_1 norm</a>, Inf. Proc. Lett. 76 (1-2) (2000) 39-44.
%F a(n) = [x^(2n)] ((1+x)/(1-x))^38.
%p c:=38: seq(coeff(series(((1+x)/(1-x))^c, x,n+1),x,n),n=0..30,2); # _Muniru A Asiru_, Jul 01 2018
%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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