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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 97 |
| 3 | 809 |
| 4 | 6737 |
| 5 | 56549 |
| 6 | 475809 |
| 7 | 4008817 |
| 8 | 33795201 |
| 9 | 284980061 |
| 10 | 2403420097 |
| 11 | 20270798553 |
| 12 | 170971640209 |
| 13 | 1442058561397 |
| 14 | 12163101107393 |
| 15 | 102590452275041 |
| 16 | 865306832676993 |
| 17 | 7298499493581101 |
| 18 | 61559793235182241 |
| 19 | 519231197740651273 |
[13,97,809,6737,56549,475809,4008817,33795201, 284980061,2403420097,20270798553,170971640209, 1442058561397,12163101107393,102590452275041, 865306832676993,7298499493581101, 61559793235182241,519231197740651273] |