|
| |
|
|
A140974
|
|
Number of binary n X n matrices symmetric about both diagonals with rows, considered as binary numbers, in nondecreasing order.
|
|
0
|
|
|
|
1, 2, 3, 4, 8, 16, 43, 136, 513, 2662, 15276, 134366, 1233504, 18634052, 281749759, 7363023774, 187712397424, 8557170854702, 375321111906249
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
