n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 15 |
4 | 166 |
5 | 2253 |
6 | 34860 |
7 | 592549 |
8 | 10828938 |
9 | 209868510 |
10 | 4273308410 |
11 | 90816552106 |
12 | 2004641983826 |
13 | 45791082809343 |
14 | 1079342545547998 |
15 | 26193557661047655 |
16 | 653283080573467694 |
17 | 16720129397788274155 |
18 | 438610481782905122800 |
[1,2,15,166,2253,34860,592549,10828938,209868510, 4273308410,90816552106,2004641983826, 45791082809343,1079342545547998,26193557661047655, 653283080573467694,16720129397788274155, 438610481782905122800] |