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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 38 |
| 3 | 379 |
| 4 | 3687 |
| 5 | 30963 |
| 6 | 253013 |
| 7 | 2042071 |
| 8 | 16390010 |
| 9 | 131304057 |
| 10 | 1051088784 |
| 11 | 8410953281 |
| 12 | 67295527293 |
| 13 | 538391560268 |
| 14 | 4307227357177 |
| 15 | 34458145224515 |
| 16 | 275666265873864 |
| 17 | 2205333684261561 |
| 18 | 17642679462717579 |
| 19 | 141141451046332037 |
[1,38,379,3687,30963,253013,2042071,16390010, 131304057,1051088784,8410953281,67295527293, 538391560268,4307227357177,34458145224515, 275666265873864,2205333684261561, 17642679462717579,141141451046332037] |