login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A145659 Weight distribution of [80,40,16] binary extended quadratic-residue (or QR) code. 0
1, 0, 0, 0, 97565, 12882688, 590073120, 10588174080, 79707678050, 263303738880, 391106339008, 263303738880, 79707678050, 10588174080, 590073120, 12882688, 97565, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Taken from the Tjhai-Tomlinson web site.

LINKS

Table of n, a(n) for n=0..20.

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 97565

20 12882688

24 590073120

28 10588174080

32 79707678050

36 263303738880

40 391106339008

44 263303738880

48 79707678050

52 10588174080

56 590073120

60 12882688

64 97565

80 1

CROSSREFS

Sequence in context: A205042 A184494 A251833 * A022214 A237509 A109185

Adjacent sequences:  A145656 A145657 A145658 * A145660 A145661 A145662

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Mar 20 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 19:31 EDT 2021. Contains 348069 sequences. (Running on oeis4.)