A145683 Weight distribution of [98,49,16] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 28518, 80801, 931588, 15038492, 166982396, 1358454930, 9150616832, 50926874040, 233809599765, 894066458642, 2860927585152, 7695094033816, 17462837266490, 33526663755928, 54576674050892

Offset

0,9

Comments

Taken from the Tjhai-Tomlinson web site.

Links

Table of n, a(n) for n=0..22.

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
16 28518
18 80801
20 931588
22 15038492
24 166982396
26 1358454930
28 9150616832
30 50926874040
32 233809599765
34 894066458642
36 2860927585152
38 7695094033816
40 17462837266490
42 33526663755928
44 54576674050892
46 75458314701252
48 88704970251121
50 88704970251121
52 75458314701252
54 54576674050892
56 33526663755928
58 17462837266490
60 7695094033816
62 2860927585152
64 894066458642
66 233809599765
68 50926874040
70 9150616832
72 1358454930
74 166982396
76 15038492
78 931588
80 80801
82 28518
98 1

Crossrefs

Sequence in context: A083612 A252879 A231417 * A205890 A186531 A253837

Adjacent sequences: A145680 A145681 A145682 * A145684 A145685 A145686

Keyword

nonn,fini

Author

N. J. A. Sloane, Mar 30 2009

Status

approved