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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 57 |
| 4 | 32547 |
| 5 | 9961491 |
| 6 | 297381939 |
| 7 | 1338104811 |
| 8 | 3942759027 |
| 9 | 5688011361 |
| 10 | 8920514307 |
| 11 | 9146532873 |
| 12 | 40253706489 |
| 13 | 243640690617 |
| 14 | 764039295291 |
| 15 | 1127102902923 |
| 16 | 1556475424971 |
| 17 | 2251315404417 |
| 18 | 3005607686883 |
| 19 | 5222670270483 |
[1,3,57,32547,9961491,297381939,1338104811, 3942759027,5688011361,8920514307,9146532873, 40253706489,243640690617,764039295291, 1127102902923,1556475424971,2251315404417, 3005607686883,5222670270483] |