n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 3 |
9 | 9 |
10 | 19 |
11 | 33 |
12 | 57 |
13 | 181 |
14 | 727 |
15 | 3143 |
16 | 12709 |
17 | 46177 |
18 | 203713 |
19 | 1168453 |
20 | 7869343 |
21 | 57494841 |
22 | 429662591 |
23 | 3357500475 |
[1,1,1,1,1,1,1,3,9,19,33,57,181,727,3143,12709, 46177,203713,1168453,7869343,57494841,429662591, 3357500475] |