%I #7 Sep 05 2023 15:21:21

%S 1,180,16200,972060,43750800,1575612036,47297528280,1217347592940,

%T 27425793987360,549462705652820,9912269336940648,162650331363653820,

%U 2448015194902257840,34033222209800507940,439668298578779894520

%N Coordination sequence for lattice D*_90 (with edges defined by l_1 norm = 1).

%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(m)=add(2^k*binomial(n, k)*binomial(m-1, k-1), k=0..n)+2^n*binomial((n+2*m)/2-1, n-1); with n=90.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, J. Serra-Sagrista (jserra(AT)ccd.uab.es)