login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A069646 Weight distribution of [97,49,15] binary quadratic-residue (or QR) code. 1
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4656, 23862, 14841, 65960, 190120, 741468, 3375988, 11662504, 40893648, 126088748, 360406410, 998048520, 2614461952, 6536154880, 15589859400, 35337014640, 76345991760, 157463608005 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,16
COMMENTS
Taken from the Tjhai-Tomlinson web site.
LINKS
Trieu-Kien Truong, Yaotsu Chang and Chong-Dao Lee, The weight distributions of some binary quadratic residue codes, IEEE Transactions on Information Theory, Issue 5, May-2005.
EXAMPLE
The weight distribution is:
i A_i
0 1
15 4656
16 23862
17 14841
18 65960
19 190120
20 741468
21 3375988
22 11662504
23 40893648
24 126088748
25 360406410
26 998048520
27 2614461952
28 6536154880
29 15589859400
30 35337014640
31 76345991760
32 157463608005
33 310186322386
34 583880136256
35 1050952990464
36 1809974594688
37 2983811972296
38 4711282061520
39 7127688680200
40 10335148586290
41 14368570181112
42 19158093574816
43 24503812839176
44 30072861211716
45 35419208941404
46 40039105759848
47 43447332367896
48 45257637883225
49 45257637883225
50 43447332367896
51 40039105759848
52 35419208941404
53 30072861211716
54 24503812839176
55 19158093574816
56 14368570181112
57 10335148586290
58 7127688680200
59 4711282061520
60 2983811972296
61 1809974594688
62 1050952990464
63 583880136256
64 310186322386
65 157463608005
66 76345991760
67 35337014640
68 15589859400
69 6536154880
70 2614461952
71 998048520
72 360406410
73 126088748
74 40893648
75 11662504
76 3375988
77 741468
78 190120
79 65960
80 14841
81 23862
82 4656
97 1
CROSSREFS
Sequence in context: A235235 A118815 A235183 * A159220 A020422 A048131
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Apr 11 2009
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)