| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 29 |
| 4 | 388 |
| 5 | 4170 |
| 6 | 41423 |
| 7 | 388998 |
| 8 | 3528126 |
| 9 | 31206553 |
| 10 | 270945278 |
| 11 | 2318825000 |
| 12 | 19619049541 |
| 13 | 164448364546 |
| 14 | 1367755750914 |
| 15 | 11301610770163 |
| 16 | 92861669073522 |
| 17 | 759320826126174 |
| 18 | 6182626278886591 |
| 19 | 50153160109476104 |
| 20 | 405492870969390486 |
[1,2,29,388,4170,41423,388998,3528126,31206553, 270945278,2318825000,19619049541,164448364546, 1367755750914,11301610770163,92861669073522, 759320826126174,6182626278886591, 50153160109476104,405492870969390486] |