|
| |
|
|
A156442
|
|
Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 6.
|
|
0
|
|
|
|
2, 0, 7, 0, 870, 0, 68180, 0, 18391220, 0, 10399874310, 0, 10075020851140, 0, 14707103186511120, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
4,1
|
|
|
LINKS
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
