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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 19 |
| 3 | 82 |
| 4 | 703 |
| 5 | 4096 |
| 6 | 29242 |
| 7 | 186733 |
| 8 | 1266103 |
| 9 | 8309143 |
| 10 | 55500634 |
| 11 | 367187437 |
| 12 | 2441886670 |
| 13 | 16193659132 |
| 14 | 107553444913 |
| 15 | 713750040577 |
| 16 | 4738726458775 |
| 17 | 31453733795086 |
| 18 | 208804386436435 |
| 19 | 1386041496850144 |
| 20 | 9200883498819958 |
| 21 | 61076450807299765 |
| 22 | 405436597890428431 |
[1,1,19,82,703,4096,29242,186733,1266103,8309143, 55500634,367187437,2441886670,16193659132, 107553444913,713750040577,4738726458775, 31453733795086,208804386436435,1386041496850144, 9200883498819958,61076450807299765, 405436597890428431] |