Search: id:A008401
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%I A008401
%S A008401 1,54,828,5202,20376,60030,146484,312858,605232,1084806,
%T A008401 1830060,2938914,4530888,6749262,9763236,13770090,18997344,
%U A008401 25704918,34187292,44775666,57840120,73791774,93084948
%N A008401 Coordination sequence for {E_6}* lattice.
%D A008401 M. O'Keeffe, Coordination sequences for lattices, Zeit. f. Krist., 210 
               (1995), 905-908.
%H A008401 T. D. Noe, <a href="b008401.txt">Table of n, a(n) for n=0..1000</a>
%H A008401 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>).
%F A008401 18*n^5 + 30*n^3 + 6*n.
%p A008401 G.f.: (1+48*x+519*x^2+1024*x^3+519*x^4+48*x^5+x^6)/(1-x)^6;
%Y A008401 Sequence in context: A139178 A157094 A093972 this_sequence A107420 A160345 
               A121625
%Y A008401 Adjacent sequences: A008398 A008399 A008400 this_sequence A008402 A008403 
               A008404
%K A008401 nonn,nice
%O A008401 0,2
%A A008401 N. J. A. Sloane (njas(AT)research.att.com).

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