Search: id:A035609
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%I A035609
%S A035609 1,40,800,10680,107200,864008,5831520,33940120,174074240,
%T A035609 800061160,3340552608,12819218040,45663942720,152270990280,
%U A035609 478683156960,1426865410392,4052167914240,11006991835560
%N A035609 Coordination sequence for lattice D*_20 (with edges defined by l_1 norm 
               = 1).
%D A035609 J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information 
               Processing Letters, 76, no. 1-2 (2000), 39-44.
%F A035609 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=20.
%Y A035609 Sequence in context: A006240 A126928 A035715 this_sequence A010992 A004421 
               A054340
%Y A035609 Adjacent sequences: A035606 A035607 A035608 this_sequence A035610 A035611 
               A035612
%K A035609 nonn
%O A035609 0,2
%A A035609 N. J. A. Sloane (njas(AT)research.att.com), J. Serra-Sagrista (jserra(AT)ccd.uab.es)

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