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A069646 Weight distribution of [97,49,15] binary quadratic-residue (or QR) code. 0
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4656, 23862, 14841, 65960, 190120, 741468, 3375988, 11662504, 40893648, 126088748, 360406410, 998048520, 2614461952, 6536154880, 15589859400, 35337014640, 76345991760, 157463608005 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,16

COMMENTS

Taken from the Tjhai-Tomlinson web site.

LINKS

Table of n, a(n) for n=0..32.

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

15 4656

16 23862

17 14841

18 65960

19 190120

20 741468

21 3375988

22 11662504

23 40893648

24 126088748

25 360406410

26 998048520

27 2614461952

28 6536154880

29 15589859400

30 35337014640

31 76345991760

32 157463608005

33 310186322386

34 583880136256

35 1050952990464

36 1809974594688

37 2983811972296

38 4711282061520

39 7127688680200

40 10335148586290

41 14368570181112

42 19158093574816

43 24503812839176

44 30072861211716

45 35419208941404

46 40039105759848

47 43447332367896

48 45257637883225

49 45257637883225

50 43447332367896

51 40039105759848

52 35419208941404

53 30072861211716

54 24503812839176

55 19158093574816

56 14368570181112

57 10335148586290

58 7127688680200

59 4711282061520

60 2983811972296

61 1809974594688

62 1050952990464

63 583880136256

64 310186322386

65 157463608005

66 76345991760

67 35337014640

68 15589859400

69 6536154880

70 2614461952

71 998048520

72 360406410

73 126088748

74 40893648

75 11662504

76 3375988

77 741468

78 190120

79 65960

80 14841

81 23862

82 4656

97 1

CROSSREFS

Sequence in context: A235235 A118815 A235183 * A159220 A020422 A048131

Adjacent sequences:  A069643 A069644 A069645 * A069647 A069648 A069649

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane, Apr 11 2009

STATUS

approved

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Last modified October 1 06:15 EDT 2014. Contains 247503 sequences.