A146075 - OEIS

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A146075

Weight distribution of [41,21,9] binary quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 0, 410, 1312, 3034, 7585, 16605, 33210, 60024, 97539, 146370, 195160, 232060, 255266, 255266, 232060, 195160, 146370, 97539, 60024, 33210, 16605, 7585, 3034, 1312, 410, 0, 0, 0, 0, 0, 0, 0, 0, 1

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OFFSET

0,10

COMMENTS

Taken from the Tjhai-Tomlinson web site.

LINKS

Table of n, a(n) for n=0..41.

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

9 410

10 1312

11 3034

12 7585

13 16605

14 33210

15 60024

16 97539

17 146370

18 195160

19 232060

20 255266

21 255266

22 232060

23 195160

24 146370

25 97539

26 60024

27 33210

28 16605

29 7585

30 3034

31 1312

32 410

41 1

CROSSREFS

Sequence in context: A157431 A179129 A176598 * A374270 A212710 A187991

Adjacent sequences: A146072 A146073 A146074 * A146076 A146077 A146078

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Apr 07 2009

STATUS

approved