A098786 Weight distribution of [90,45,18] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 0, 274120, 2819520, 30530115, 249109665, 1650476520, 8806726665, 38261417997, 136522171665, 402352364565, 983530112015, 2001805012350, 3403264592178, 4842229755990, 5773480681050

Offset

0,10

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
18 274120
20 2819520
22 30530115
24 249109665
26 1650476520
28 8806726665
30 38261417997
32 136522171665
34 402352364565
36 983530112015
38 2001805012350
40 3403264592178
42 4842229755990
44 5773480681050
46 5773480681050
48 4842229755990
50 3403264592178
52 2001805012350
54 983530112015
56 402352364565
58 136522171665
60 38261417997
62 8806726665
64 1650476520
66 249109665
68 30530115
70 2819520
72 274120
90 1

Crossrefs

Sequence in context: A114663 A151650 A128479 * A351332 A235300 A256364

Adjacent sequences: A098783 A098784 A098785 * A098787 A098788 A098789

Keyword

nonn,fini

Author

N. J. A. Sloane, Mar 30 2009

Status

approved