A098786 - OEIS

%I #3 Mar 30 2012 16:50:03

%S 1,0,0,0,0,0,0,0,0,274120,2819520,30530115,249109665,1650476520,

%T 8806726665,38261417997,136522171665,402352364565,983530112015,

%U 2001805012350,3403264592178,4842229755990,5773480681050

%N Weight distribution of [90,45,18] 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 18 274120

%e 20 2819520

%e 22 30530115

%e 24 249109665

%e 26 1650476520

%e 28 8806726665

%e 30 38261417997

%e 32 136522171665

%e 34 402352364565

%e 36 983530112015

%e 38 2001805012350

%e 40 3403264592178

%e 42 4842229755990

%e 44 5773480681050

%e 46 5773480681050

%e 48 4842229755990

%e 50 3403264592178

%e 52 2001805012350

%e 54 983530112015

%e 56 402352364565

%e 58 136522171665

%e 60 38261417997

%e 62 8806726665

%e 64 1650476520

%e 66 249109665

%e 68 30530115

%e 70 2819520

%e 72 274120

%e 90 1

%K nonn,fini

%O 0,10

%A _N. J. A. Sloane_, Mar 30 2009