n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | 19 |
5 | 135 |
6 | 1267 |
7 | 15029 |
8 | 218627 |
9 | 3783582 |
10 | 75956664 |
11 | 1734309929 |
12 | 44357222772 |
13 | 1255715827483 |
14 | 38971877812380 |
15 | 1315634598619830 |
16 | 47994245894462576 |
17 | 1881406032047006812 |
18 | 78870928008704884848 |
19 | 3520953336130828001295 |
20 | 166762291211479030734580 |
[1,3,19,135,1267,15029,218627,3783582,75956664, 1734309929,44357222772,1255715827483, 38971877812380,1315634598619830,47994245894462576, 1881406032047006812,78870928008704884848, 3520953336130828001295,166762291211479030734580] |