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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 157 |
| 4 | 4209 |
| 5 | 153301 |
| 6 | 7075209 |
| 7 | 395858317 |
| 8 | 26043658209 |
| 9 | 1970447255941 |
| 10 | 168569253106809 |
| 11 | 16090431675455677 |
| 12 | 1695423031884496209 |
| 13 | 195469637688003331381 |
| 14 | 24477403062879209570409 |
| 15 | 3308367753565825806208237 |
| 16 | 480047805083610542972470209 |
| 17 | 74429414765710201956179803621 |
[1,1,9,157,4209,153301,7075209,395858317, 26043658209,1970447255941,168569253106809, 16090431675455677,1695423031884496209, 195469637688003331381,24477403062879209570409, 3308367753565825806208237, 480047805083610542972470209, 74429414765710201956179803621] |