A145659 Weight distribution of [80,40,16] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 97565, 12882688, 590073120, 10588174080, 79707678050, 263303738880, 391106339008, 263303738880, 79707678050, 10588174080, 590073120, 12882688, 97565, 0, 0, 0, 1

Offset

0,5

Comments

Taken from the Tjhai-Tomlinson web site.

Links

Table of n, a(n) for n=0..20.

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 97565
20 12882688
24 590073120
28 10588174080
32 79707678050
36 263303738880
40 391106339008
44 263303738880
48 79707678050
52 10588174080
56 590073120
60 12882688
64 97565
80 1

Crossrefs

Sequence in context: A205042 A184494 A251833 * A022214 A237509 A109185

Adjacent sequences: A145656 A145657 A145658 * A145660 A145661 A145662

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Mar 20 2009

Status

approved