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A145685 Weight distribution of [120,60,20] binary extended quadratic-residue (or QR) code. 0

%I #2 Mar 30 2012 16:51:01

%S 1,0,0,0,0,56896,12886944,2935906752,320496430380,18071400219840,

%T 552526728803616,9491105395362624,94116098389459776,

%U 549827720843995776,1920594821540759296,4051982879111857664

%N Weight distribution of [120,60,20] binary extended quadratic-residue (or QR) code.

%C Taken from the Tjhai-Tomlinson web site.

%H C. J. Tjhai and Martin Tomlinson, <a href="http://www.tech.plym.ac.uk/Research/fixed_and_mobile_communications/links/weightdistributions.htm">Weight Distributions of Quadratic Residue and Quadratic Double Circulant Codes over GF(2)</a>

%e The weight distribution is:

%e i A_i

%e 0 1

%e 20 56896

%e 24 12886944

%e 28 2935906752

%e 32 320496430380

%e 36 18071400219840

%e 40 552526728803616

%e 44 9491105395362624

%e 48 94116098389459776

%e 52 549827720843995776

%e 56 1920594821540759296

%e 60 4051982879111857664

%e 64 5193576979998072832

%e 68 4051982879111857664

%e 72 1920594821540759296

%e 76 549827720843995776

%e 80 94116098389459776

%e 84 9491105395362624

%e 88 552526728803616

%e 92 18071400219840

%e 96 320496430380

%e 100 2935906752

%e 104 12886944

%e 108 56896

%e 128 1

%K nonn,fini

%O 0,6

%A _N. J. A. Sloane_, Apr 02 2009

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