n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 17 |
4 | 73 |
5 | 381 |
6 | 2347 |
7 | 16701 |
8 | 134993 |
9 | 1222873 |
10 | 12279251 |
11 | 135425553 |
12 | 1627809401 |
13 | 21183890469 |
14 | 296773827547 |
15 | 4453511170517 |
16 | 71275570240417 |
17 | 1211894559430065 |
18 | 21816506949416611 |
19 | 414542720924028441 |
20 | 8291224789668806345 |
21 | 174120672081098057341 |
[1,2,5,17,73,381,2347,16701,134993,1222873, 12279251,135425553,1627809401,21183890469, 296773827547,4453511170517,71275570240417, 1211894559430065,21816506949416611, 414542720924028441,8291224789668806345, 174120672081098057341] |