A145922 Weight distribution of [71,36,13] binary quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 497, 2485, 0, 0, 47570, 166495, 0, 0, 5084310, 13219206, 0, 0, 154102305, 308204610, 0, 0, 1710651635, 2688166855, 0, 0, 7377935180, 9222418975, 0, 0, 12879738244, 12879738244, 0, 0, 9222418975

Offset

0,12

Comments

Taken from the Tjhai-Tomlinson web site.

Links

Table of n, a(n) for n=0..39.

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
11 497
12 2485
15 47570
16 166495
19 5084310
20 13219206
23 154102305
24 308204610
27 1710651635
28 2688166855
31 7377935180
32 9222418975
35 12879738244
36 12879738244
39 9222418975
40 7377935180
43 2688166855
44 1710651635
47 308204610
48 154102305
51 13219206
52 5084310
55 166495
56 47570
59 2485
60 497
71 1

Crossrefs

Sequence in context: A108157 A062676 A097785 * A145981 A373103 A210785

Adjacent sequences: A145919 A145920 A145921 * A145923 A145924 A145925

Keyword

nonn,fini

Author

N. J. A. Sloane, Apr 07 2009

Status

approved