A072189 - OEIS

A072189

Weight distribution of [103,52,19] binary quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 218875, 919275, 0, 0, 47592180, 158640600, 0, 0, 4283380248, 11626317816, 0, 0, 174684872920, 393040964070, 0, 0, 3432179437380, 6483005603940, 0, 0, 33982965303425, 54372744485480

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,20

COMMENTS

Taken from the Tjhai-Tomlinson web site.

LINKS

Sean A. Irvine, Table of n, a(n) for n = 0..103

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

19 218875

20 919275

23 47592180

24 158640600

27 4283380248

28 11626317816

31 174684872920

32 393040964070

35 3432179437380

36 6483005603940

39 33982965303425

40 54372744485480

43 174960847539720

44 238582973917800

47 478328764312680

48 558050225031460

51 703022265147378

52 703022265147378

55 558050225031460

56 478328764312680

59 238582973917800

60 174960847539720

63 54372744485480

64 33982965303425

67 6483005603940

68 3432179437380

71 393040964070

72 174684872920

75 11626317816

76 4283380248

79 158640600

80 47592180

83 919275

84 218875

103 1

CROSSREFS

Sequence in context: A090873 A236040 A251480 * A187865 A201227 A185531

Adjacent sequences: A072186 A072187 A072188 * A072190 A072191 A072192

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Apr 11 2009

STATUS

approved