A145687 Weight distribution of [168,84,24] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 0, 776216, 18130188, 5550332508, 1251282702264, 166071600559137, 13047136918828740, 629048543890724224, 19087130695796613120, 372099690249351069696, 4739291519495550533632

Offset

0,7

Comments

Taken from the Tjhai-Tomlinson web site.

Links

Table of n, a(n) for n=0..15.

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
24 776216
28 18130188
32 5550332508
36 1251282702264
40 166071600559137
44 13047136918828740
48 629048543890724224
52 19087130695796613120
56 372099690249351069696
60 4739291519495550533632
64 39973673337590380494848
68 225696677727188706918400
72 860241108921860734582784
76 2227390683565491872595968
80 3935099586463594350379008
84 4755747412595715350724608
88 3935099586463594350379008
92 2227390683565491872595968
96 860241108921860734582784
100 225696677727188706918400
104 39973673337590380494848
108 4739291519495550533632
112 372099690249351069696
116 19087130695796613120
120 629048543890724224
124 13047136918828740
128 166071600559137
132 1251282702264
136 5550332508
140 18130188
144 776216
168 1

Crossrefs

Sequence in context: A023348 A089007 A252951 * A244071 A157357 A146953

Adjacent sequences: A145684 A145685 A145686 * A145688 A145689 A145690

Keyword

nonn,fini

Author

N. J. A. Sloane, Apr 02 2009

Status

approved