|
|
A162028
|
|
Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 2 rows or columns zero
|
|
1
|
|
|
86, 393, 1319, 4133, 12139, 33357, 85798, 207283, 472758, 1023449, 2114041, 4186441, 7981693, 14705357, 26266256, 45614055, 77207792, 127655369, 206573275, 327726605, 510521919, 781939821, 1179010506, 1751954107, 2568128666
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
4,1
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|