login
This site is supported by donations to The OEIS Foundation.

 

Logo

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091536 Weight distribution of [89,45,17] binary quadratic-residue (or QR) code. 0
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 54824, 219296, 626560, 2192960, 7462917, 23067198, 66429244, 182680421, 476804328, 1173672192, 2739870518, 6066856147, 12753805999, 25507611998, 48541216592 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,18

COMMENTS

Taken from the Tjhai-Tomlinson web site.

LINKS

Table of n, a(n) for n=0..31.

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

17 54824

18 219296

19 626560

20 2192960

21 7462917

22 23067198

23 66429244

24 182680421

25 476804328

26 1173672192

27 2739870518

28 6066856147

29 12753805999

30 25507611998

31 48541216592

32 87980955073

33 151999782169

34 250352582396

35 393412044806

36 590118067209

37 845206560770

38 1156598451580

39 1512562040968

40 1890702551210

41 2259707219462

42 2582522536528

43 2822590555180

44 2950890125870

45 2950890125870

46 2822590555180

47 2582522536528

48 2259707219462

49 1890702551210

50 1512562040968

51 1156598451580

52 845206560770

53 590118067209

54 393412044806

55 250352582396

56 151999782169

57 87980955073

58 48541216592

59 25507611998

60 12753805999

61 6066856147

62 2739870518

63 1173672192

64 476804328

65 182680421

66 66429244

67 23067198

68 7462917

69 2192960

70 626560

71 219296

72 54824

89 1

CROSSREFS

Sequence in context: A083616 A235104 A205997 * A237732 A251164 A253148

Adjacent sequences:  A091533 A091534 A091535 * A091537 A091538 A091539

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane, Apr 10 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified August 19 23:35 EDT 2017. Contains 290821 sequences.