n | a(n) |
---|---|
2 | 1 |
3 | 21 |
4 | 294 |
5 | 3430 |
6 | 36015 |
7 | 352947 |
8 | 3294172 |
9 | 29647548 |
10 | 259416045 |
11 | 2219448385 |
12 | 18643366434 |
13 | 154231485954 |
14 | 1259557135291 |
15 | 10173346092735 |
16 | 81386768741880 |
17 | 645668365352248 |
18 | 5084638377148953 |
19 | 39779817891812397 |
20 | 309398583602985310 |
[1,21,294,3430,36015,352947,3294172,29647548, 259416045,2219448385,18643366434,154231485954, 1259557135291,10173346092735,81386768741880, 645668365352248,5084638377148953, 39779817891812397,309398583602985310] |