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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 136 |
| 3 | 801 |
| 4 | 7951 |
| 5 | 72890 |
| 6 | 613788 |
| 7 | 5520182 |
| 8 | 49761178 |
| 9 | 438900203 |
| 10 | 3913217575 |
| 11 | 35001959685 |
| 12 | 311226922346 |
| 13 | 2773389569852 |
| 14 | 24746739423770 |
| 15 | 220418350333049 |
| 16 | 1964392868647454 |
| 17 | 17514958932280674 |
| 18 | 156075467421913702 |
[16,136,801,7951,72890,613788,5520182,49761178, 438900203,3913217575,35001959685,311226922346, 2773389569852,24746739423770,220418350333049, 1964392868647454,17514958932280674, 156075467421913702] |