|
| |
|
|
A141048
|
|
Number of n X n binary matrices, symmetric under 180 degree rotation, with rows, considered as binary numbers, in nondecreasing order.
|
|
0
|
|
|
|
1, 2, 3, 6, 19, 104, 714, 10288, 181480, 8058336, 431947824, 66774883640, 11792570643048, 6617203485824240, 3981347426807559400, 8141786556740296629920, 17017992772547895875527944
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
