A145686 Weight distribution of [152,76,20] binary extended quadratic-residue (or QR) code.

1, 0, 0, 0, 0, 28690, 717250, 164250250, 39390351505, 5498418962110, 430930711621830, 19714914846904500, 542987434093298560, 9222363801696269312, 98458872937331752960, 670740325520798121984

Offset

0,6

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
20 28690
24 717250
28 164250250
32 39390351505
36 5498418962110
40 430930711621830
44 19714914846904500
48 542987434093298560
52 9222363801696269312
56 98458872937331752960
60 670740325520798121984
64 2949674479653615566848
68 8446025592483506814976
72 15840564760239237234688
76 19527364659006696062976
80 15840564760239237234688
84 8446025592483506814976
88 2949674479653615566848
92 670740325520798121984
96 98458872937331752960
100 9222363801696269312
104 542987434093298560
108 19714914846904500
112 430930711621830
116 5498418962110
120 39390351505
124 164250250
128 717250
132 28690
152 1

Crossrefs

Sequence in context: A122650 A172755 A172827 * A224576 A234835 A255659

Adjacent sequences: A145683 A145684 A145685 * A145687 A145688 A145689

Keyword

nonn,fini

Author

N. J. A. Sloane, Apr 02 2009

Status

approved