A145683 - OEIS

A145683

Weight distribution of [98,49,16] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 0, 0, 28518, 80801, 931588, 15038492, 166982396, 1358454930, 9150616832, 50926874040, 233809599765, 894066458642, 2860927585152, 7695094033816, 17462837266490, 33526663755928, 54576674050892

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OFFSET

0,9

COMMENTS

Taken from the Tjhai-Tomlinson web site.

LINKS

Table of n, a(n) for n=0..22.

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 28518

18 80801

20 931588

22 15038492

24 166982396

26 1358454930

28 9150616832

30 50926874040

32 233809599765

34 894066458642

36 2860927585152

38 7695094033816

40 17462837266490

42 33526663755928

44 54576674050892

46 75458314701252

48 88704970251121

50 88704970251121

52 75458314701252

54 54576674050892

56 33526663755928

58 17462837266490

60 7695094033816

62 2860927585152

64 894066458642

66 233809599765

68 50926874040

70 9150616832

72 1358454930

74 166982396

76 15038492

78 931588

80 80801

82 28518

98 1

CROSSREFS

Sequence in context: A083612 A252879 A231417 * A205890 A186531 A253837

Adjacent sequences: A145680 A145681 A145682 * A145684 A145685 A145686

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane, Mar 30 2009

STATUS

approved