n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 5 |
4 | 17 |
5 | 77 |
6 | 457 |
7 | 2641 |
8 | 19777 |
9 | 149529 |
10 | 1305489 |
11 | 12183613 |
12 | 122670033 |
13 | 1342074021 |
14 | 15462740633 |
15 | 192192501897 |
16 | 2502900454401 |
17 | 34713417890609 |
18 | 504155298072609 |
19 | 7713202738776565 |
20 | 123438576028985873 |
[1,1,1,5,17,77,457,2641,19777,149529,1305489, 12183613,122670033,1342074021,15462740633, 192192501897,2502900454401,34713417890609, 504155298072609,7713202738776565, 123438576028985873] |