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| n | a(n) |
|---|---|
| 1 | 171 |
| 2 | 2121 |
| 3 | 24414 |
| 4 | 285724 |
| 5 | 3409112 |
| 6 | 40893800 |
| 7 | 492154924 |
| 8 | 5938127608 |
| 9 | 71755699992 |
| 10 | 868144018572 |
| 11 | 10511898062464 |
| 12 | 127364674658272 |
| 13 | 1543896563706688 |
| 14 | 18721690171445596 |
| 15 | 227085751983499944 |
| 16 | 2755034034648413220 |
[171,2121,24414,285724,3409112,40893800,492154924, 5938127608,71755699992,868144018572, 10511898062464,127364674658272,1543896563706688, 18721690171445596,227085751983499944, 2755034034648413220] |