A091536 Weight distribution of [89,45,17] binary quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 54824, 219296, 626560, 2192960, 7462917, 23067198, 66429244, 182680421, 476804328, 1173672192, 2739870518, 6066856147, 12753805999, 25507611998, 48541216592

Offset

0,18

Comments

Taken from the Tjhai-Tomlinson web site.

Links

Table of n, a(n) for n=0..31.

C. J. Tjhai and Martin Tomlinson, Weight Distributions of Quadratic Residue and Quadratic Double Circulant Codes over GF(2)

Example

The weight distribution is:
i A_i
0 1
17 54824
18 219296
19 626560
20 2192960
21 7462917
22 23067198
23 66429244
24 182680421
25 476804328
26 1173672192
27 2739870518
28 6066856147
29 12753805999
30 25507611998
31 48541216592
32 87980955073
33 151999782169
34 250352582396
35 393412044806
36 590118067209
37 845206560770
38 1156598451580
39 1512562040968
40 1890702551210
41 2259707219462
42 2582522536528
43 2822590555180
44 2950890125870
45 2950890125870
46 2822590555180
47 2582522536528
48 2259707219462
49 1890702551210
50 1512562040968
51 1156598451580
52 845206560770
53 590118067209
54 393412044806
55 250352582396
56 151999782169
57 87980955073
58 48541216592
59 25507611998
60 12753805999
61 6066856147
62 2739870518
63 1173672192
64 476804328
65 182680421
66 66429244
67 23067198
68 7462917
69 2192960
70 626560
71 219296
72 54824
89 1

Crossrefs

Sequence in context: A083616 A235104 A205997 * A237732 A251164 A253148

Adjacent sequences: A091533 A091534 A091535 * A091537 A091538 A091539

Keyword

nonn,fini

Author

N. J. A. Sloane, Apr 10 2009

Status

approved