A084554 Weight distribution of [104,52,20] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 1138150, 206232780, 15909698064, 567725836990, 9915185041320, 88355709788905, 413543821457520, 1036378989344140, 1406044530294756, 1036378989344140, 413543821457520, 88355709788905, 9915185041320

Offset

0,6

Comments

Taken from the Tjhai-Tomlinson web site.

Links

Table of n, a(n) for n=0..17.

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
20 1138150
24 206232780
28 15909698064
32 567725836990
36 9915185041320
40 88355709788905
44 413543821457520
48 1036378989344140
52 1406044530294756
56 1036378989344140
60 413543821457520
64 88355709788905
68 9915185041320
72 567725836990
76 15909698064
80 206232780
84 1138150
104 1

Crossrefs

Sequence in context: A363957 A234979 A233874 * A339982 A234554 A192104

Adjacent sequences: A084551 A084552 A084553 * A084555 A084556 A084557

Keyword

nonn,fini

Author

N. J. A. Sloane, Mar 30 2009

Status

approved