Search: id:A035926
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%I A035926
%S A035926 1,20000,66680000,88977788000,63669939056000,28388261970800800,
%T A035926 8645481416595304000,1913769409906455052000,322081772124335598304000,
%U A035926 42639787126552298702388000,4560880160205473732557707200
%N A035926 Coordination sequence for diamond structure D^+_100. (Edges defined by 
               l_1 norm = 1.)
%D A035926 J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information 
               Processing Letters, 76, no. 1-2 (2000), 39-44.
%H A035926 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:/
               /www.research.att.com/~njas/doc/ldl7.txt">Abstract</a>, <a href="http:/
               /www.research.att.com/~njas/doc/ldl7.pdf">pdf</a>, <a href="http:/
               /www.research.att.com/~njas/doc/ldl7.ps">ps</a>).
%p A035926 f := proc(m) local k,t1; t1 := 2^(n-1)*binomial((n+2*m)/2-1,n-1); if 
               m mod 2 = 0 then t1 := t1+add(2^k*binomial(n,k)*binomial(m-1,k-1),
               k=0..n); fi; t1; end; where n=100.
%Y A035926 Sequence in context: A017565 A081866 A090072 this_sequence A145535 A109479 
               A003808
%Y A035926 Adjacent sequences: A035923 A035924 A035925 this_sequence A035927 A035928 
               A035929
%K A035926 nonn
%O A035926 0,2
%A A035926 J. Serra-Sagrista (jserra(AT)ccd.uab.es) Recomputed by N. J. A. Sloane 
               (njas(AT)research.att.com) Nov 27 1998.

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