n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 7 |
6 | 19 |
7 | 89 |
8 | 399 |
9 | 1939 |
10 | 11793 |
11 | 102715 |
12 | 985113 |
13 | 13989079 |
14 | 211198639 |
15 | 4331591655 |
16 | 98297746517 |
17 | 2965968725989 |
18 | 100683520176799 |
[1,1,1,3,7,19,89,399,1939,11793,102715,985113, 13989079,211198639,4331591655,98297746517, 2965968725989,100683520176799] |