|
Search: id:A140722
|
|
|
| A140722 |
|
Number of n X n symmetric matrices with nonnegative integer entries with each row sum i equal to i (1..n). |
|
+0
1
|
|
| 1, 2, 8, 61, 957, 31520, 2199080, 328002710, 105370907181
(list; graph; listen)
|
|
|
|
|
Search completed in 0.002 seconds
|
