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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 58 |
| 4 | 419 |
| 5 | 3149 |
| 6 | 24095 |
| 7 | 186348 |
| 8 | 1452236 |
| 9 | 11385356 |
| 10 | 89697284 |
| 11 | 709549769 |
| 12 | 5632222541 |
| 13 | 44837998135 |
| 14 | 357848802839 |
| 15 | 2862135963926 |
| 16 | 22934807116783 |
| 17 | 184082328044394 |
| 18 | 1479641153930348 |
| 19 | 11908495546392890 |
| 20 | 95951907989239148 |
[2,9,58,419,3149,24095,186348,1452236,11385356, 89697284,709549769,5632222541,44837998135, 357848802839,2862135963926,22934807116783, 184082328044394,1479641153930348, 11908495546392890,95951907989239148] |