Search: id:A028239
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%I A028239
%S A028239 1,0,0,41664,2118168,74203584,1602647424,23369897088,238532662620,
%T A028239 1758643689600,9579950593920,39232098538560,122387418032040,
%U A028239 293729091759936,546275088069376,791155554970368,894836772921798
%N A028239 Weight distribution of (64,2^52,6) Preparata code.
%D A028239 F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting 
               Codes, Elsevier-North Holland, 1978, p. 471.
%H A028239 A. R. Hammons, Jr., P. V. Kumar, A. R. Calderbank, N. J. A. Sloane and 
               P. Sole', <a href="http://www.research.att.com/~njas/doc/linear.txt">
               The Z_4 linearity of Kerdock, Preparata, Goethals and related codes</
               a>, IEEE Trans. Inform. Theory, 40 (1994), 301-319.
%e A028239 1+41664*y^6+2118168*y^8+74203584*y^10+1602647424*y^12+23369897088*y^14+238532662620*y^16+ 
               1758643689600*y^18+9579950593920*y^20+39232098538560*y^22+122387418032040*y^24+293729091759936*y^26+ 
               546275088069376*y^28+791155554970368*y^30+894836772921798*y^32+791155554970368*y^34+546275088069376*y^36 
               +293729091759936*y^38+122387418032040*y^40+39232098538560*y^42+9579950593920*y^44+1758643689600*y^46+ 
               238532662620*y^48+23369897088*y^50+1602647424*y^52+74203584*y^54+2118168*y^56+41664*y^58+1*y^64.
%Y A028239 Cf. A010032, A109159.
%Y A028239 Sequence in context: A165114 A002879 A163392 this_sequence A031849 A151818 
               A103155
%Y A028239 Adjacent sequences: A028236 A028237 A028238 this_sequence A028240 A028241 
               A028242
%K A028239 nonn,fini
%O A028239 0,4
%A A028239 N. J. A. Sloane (njas(AT)research.att.com).

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