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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 19 |
| 2 | 251 |
| 3 | 2899 |
| 4 | 38027 |
| 5 | 509239 |
| 6 | 6922823 |
| 7 | 94744711 |
| 8 | 1301066891 |
| 9 | 17895943729 |
| 10 | 246351600811 |
| 11 | 3392528778229 |
| 12 | 46727519959343 |
| 13 | 643666830505159 |
| 14 | 8866832290305149 |
| 15 | 122147626590349999 |
| 16 | 1682697341501872923 |
[1,19,251,2899,38027,509239,6922823,94744711, 1301066891,17895943729,246351600811,3392528778229, 46727519959343,643666830505159,8866832290305149, 122147626590349999,1682697341501872923] |