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Search: id:A072189
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| A072189 |
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Weight distribution of [103,52,19] binary quadratic-residue (or QR) code. |
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+0
1
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| 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 218875, 919275, 0, 0, 47592180, 158640600, 0, 0, 4283380248, 11626317816, 0, 0, 174684872920, 393040964070, 0, 0, 3432179437380, 6483005603940, 0, 0, 33982965303425, 54372744485480
(list; graph; listen)
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OFFSET
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0,20
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COMMENT
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Taken from the Tjhai-Tomlinson web site.
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LINKS
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C. J. Tjhai and Martin Tomlinson, Weight Distributions of Quadratic Residue and Quadratic Double Circulant Codes over GF(2)
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EXAMPLE
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The weight distribution is:
i A_i
0 1
19 218875
20 919275
23 47592180
24 158640600
27 4283380248
28 11626317816
31 174684872920
32 393040964070
35 3432179437380
36 6483005603940
39 33982965303425
40 54372744485480
43 174960847539720
44 238582973917800
47 478328764312680
48 558050225031460
51 703022265147378
52 703022265147378
55 558050225031460
56 478328764312680
59 238582973917800
60 174960847539720
63 54372744485480
64 33982965303425
67 6483005603940
68 3432179437380
71 393040964070
72 174684872920
75 11626317816
76 4283380248
79 158640600
80 47592180
83 919275
84 218875
103 1
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CROSSREFS
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Sequence in context: A019291 A157377 A090873 this_sequence A046396 A083640 A165411
Adjacent sequences: A072186 A072187 A072188 this_sequence A072190 A072191 A072192
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KEYWORD
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nonn,fini
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Apr 11 2009
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