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A035820 Coordination sequence for lattice D*_70 (with edges defined by l_1 norm = 1). 0

%I #7 Sep 05 2023 15:17:51

%S 1,140,9800,457380,16013200,448644028,10479036120,209901182420,

%T 3681129969440,57425278222060,806898799084392,10316605397801220,

%U 121032811973584560,1312159718129050140,13225339591553573880

%N Coordination sequence for lattice D*_70 (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=70.

%K nonn

%O 0,2

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

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Last modified April 25 13:02 EDT 2024. Contains 371969 sequences. (Running on oeis4.)