| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 19 |
| 2 | 239 |
| 3 | 2519 |
| 4 | 24135 |
| 5 | 218343 |
| 6 | 1903783 |
| 7 | 16194343 |
| 8 | 135426599 |
| 9 | 1118993447 |
| 10 | 9166829607 |
| 11 | 74629521447 |
| 12 | 604827848743 |
| 13 | 4885462331431 |
| 14 | 39365093814311 |
| 15 | 316610553147431 |
| 16 | 2543028967600167 |
| 17 | 20405121901817895 |
[1,19,239,2519,24135,218343,1903783,16194343, 135426599,1118993447,9166829607,74629521447, 604827848743,4885462331431,39365093814311, 316610553147431,2543028967600167, 20405121901817895] |