|
|
A145259
|
|
1/9 of the number of 9-colorings of an n X n array symmetric about both diagonal and antidiagonal.
|
|
0
|
|
|
1, 8, 512, 29184, 13307904, 5404672512, 17559792635904, 50811763602977280, 1176249454737889112064, 24250990871047073899451904, 3999906334177619217671691141120
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|