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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 17 |
| 3 | 117 |
| 4 | 971 |
| 5 | 8781 |
| 6 | 63549 |
| 7 | 543386 |
| 8 | 4387171 |
| 9 | 35669727 |
| 10 | 291499339 |
| 11 | 2369674010 |
| 12 | 19309008083 |
| 13 | 157281534172 |
| 14 | 1280854062374 |
| 15 | 10433074844133 |
| 16 | 84973377328059 |
| 17 | 692089317826577 |
| 18 | 5636954496741421 |
| 19 | 45911687873344354 |
| 20 | 373941550763350063 |
[1,17,117,971,8781,63549,543386,4387171,35669727, 291499339,2369674010,19309008083,157281534172, 1280854062374,10433074844133,84973377328059, 692089317826577,5636954496741421, 45911687873344354,373941550763350063] |