Search: id:A004021
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%I A004021 M5448
%S A004021 1,372,768,5684,6144,28608,23040,91956,61440,224680,140544,458688,
%T A004021 276480,358240,480768,1467188,798720,2329012,1251072,3590952,1843200
%N A004021 Theta series of packing P_{10c}.
%D A004021 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A004021 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", 
               Springer-Verlag, p. 140.
%Y A004021 Sequence in context: A165330 A051182 A161362 this_sequence A161361 A139659 
               A142395
%Y A004021 Adjacent sequences: A004018 A004019 A004020 this_sequence A004022 A004023 
               A004024
%K A004021 nonn
%O A004021 0,2
%A A004021 N. J. A. Sloane (njas(AT)research.att.com).

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