A151660 Weight distribution of [256,63,64] extended binary primitive BCH (or XBCH) code.

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 43180, 261120, 0, 1501440, 7376640, 98572800, 172078080, 2851952640, 4852262400, 67242055680, 96309150720, 1166182422528, 1459521557760

Offset

0,33

Comments

Taken from the Terada-Asatani-Koumoto web site.

Links

Table of n, a(n) for n=0..44.

M. Terada, J. Asatani and T. Koumoto, Weight Distribution

Example

The weight distribution is:
i A_i
0 1
64 43180
66 261120
70 1501440
72 7376640
74 98572800
76 172078080
78 2851952640
80 4852262400
82 67242055680
84 96309150720
86 1166182422528
88 1459521557760
90 15321213010176
92 16709035898880
94 153312193244160
96 146146884054336
98 1173316151301120
100 979975572879360
102 6900428068335360
104 5059392102393600
106 31299895943230464
108 20178601990364160
110 109843178924304384
112 62349216734702080
114 298997057318922240
116 149588571210624000
118 632550521391905280
120 279154377573332224
122 1041579982098712320
124 405696763652689920
126 1336250264140809216
128 459500377974879270
130 1336250264140809216
132 405696763652689920
134 1041579982098712320
136 279154377573332224
138 632550521391905280
140 149588571210624000
142 298997057318922240
144 62349216734702080
146 109843178924304384
148 20178601990364160
150 31299895943230464
152 5059392102393600
154 6900428068335360
156 979975572879360
158 1173316151301120
160 146146884054336
162 153312193244160
164 16709035898880
166 15321213010176
168 1459521557760
170 1166182422528
172 96309150720
174 67242055680
176 4852262400
178 2851952640
180 172078080
182 98572800
184 7376640
186 1501440
190 261120
192 43180
256 1

Crossrefs

Sequence in context: A134450 A141085 A151623 * A238595 A205053 A146074

Adjacent sequences: A151657 A151658 A151659 * A151661 A151662 A151663

Keyword

nonn,fini

Author

N. J. A. Sloane, May 30 2009

Status

approved