| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 17 |
| 3 | 231 |
| 4 | 3724 |
| 5 | 68819 |
| 6 | 1464781 |
| 7 | 35645040 |
| 8 | 973624491 |
| 9 | 29313919207 |
| 10 | 960689482494 |
| 11 | 33997330377817 |
| 12 | 1291521482389621 |
| 13 | 52395164853506674 |
| 14 | 2259005857941805253 |
| 15 | 103064324686839195035 |
| 16 | 4957382457319437575820 |
| 17 | 250592665906288206715951 |
| 18 | 13275467282249493427541201 |
[1,2,17,231,3724,68819,1464781,35645040,973624491, 29313919207,960689482494,33997330377817, 1291521482389621,52395164853506674, 2259005857941805253,103064324686839195035, 4957382457319437575820,250592665906288206715951, 13275467282249493427541201] |