n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 11 |
4 | 53 |
5 | 305 |
6 | 2051 |
7 | 15731 |
8 | 135697 |
9 | 1300869 |
10 | 13726431 |
11 | 158137851 |
12 | 1975599321 |
13 | 26607158781 |
14 | 384347911211 |
15 | 5928465081703 |
16 | 97262304328573 |
17 | 1691274884085061 |
18 | 31073791192091251 |
19 | 601539400910369671 |
20 | 12238270940611270161 |
21 | 261071590963047040241 |
[1,1,3,11,53,305,2051,15731,135697,1300869, 13726431,158137851,1975599321,26607158781, 384347911211,5928465081703,97262304328573, 1691274884085061,31073791192091251, 601539400910369671,12238270940611270161, 261071590963047040241] |