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| n | a(n) |
|---|---|
| 1 | 71 |
| 2 | 571 |
| 3 | 4585 |
| 4 | 36825 |
| 5 | 295759 |
| 6 | 2375387 |
| 7 | 19077905 |
| 8 | 153224073 |
| 9 | 1230618167 |
| 10 | 9883701979 |
| 11 | 79380889561 |
| 12 | 637547109465 |
| 13 | 5120455553407 |
| 14 | 41124906199355 |
| 15 | 330294422491457 |
| 16 | 2652757552810569 |
| 17 | 21305605407779879 |
| 18 | 171115834280100859 |
[71,571,4585,36825,295759,2375387,19077905, 153224073,1230618167,9883701979,79380889561, 637547109465,5120455553407,41124906199355, 330294422491457,2652757552810569, 21305605407779879,171115834280100859] |