n | a(n) |
---|---|
2 | 1 |
3 | 15 |
4 | 528 |
5 | 3990 |
6 | 232305 |
7 | 4262895 |
8 | 128928632 |
9 | 1420184304 |
10 | 186936865290 |
11 | 2416826727315 |
12 | 436683783190248 |
13 | 6495589851083190 |
14 | 102988034105173217 |
15 | 3468347338313592735 |
16 | 1050976389766688264880 |
17 | 19771777981152440202960 |
18 | 7439086137698489458667340 |
19 | 154685313008524836907739370 |
20 | 3369940174123349111629009120 |
[1,15,528,3990,232305,4262895,128928632, 1420184304,186936865290,2416826727315, 436683783190248,6495589851083190, 102988034105173217,3468347338313592735, 1050976389766688264880,19771777981152440202960, 7439086137698489458667340, 154685313008524836907739370, 3369940174123349111629009120] |