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| n | a(n) |
|---|---|
| 1 | 543 |
| 2 | 2920 |
| 3 | 15246 |
| 4 | 76320 |
| 5 | 362241 |
| 6 | 1647460 |
| 7 | 7249825 |
| 8 | 31113316 |
| 9 | 131014715 |
| 10 | 543845812 |
| 11 | 2233368847 |
| 12 | 9098214240 |
| 13 | 36844025643 |
| 14 | 148553970588 |
| 15 | 597082293823 |
| 16 | 2394504059784 |
| 17 | 9587995012203 |
| 18 | 38352450171812 |
| 19 | 153311305422383 |
[543,2920,15246,76320,362241,1647460,7249825, 31113316,131014715,543845812,2233368847, 9098214240,36844025643,148553970588,597082293823, 2394504059784,9587995012203,38352450171812, 153311305422383] |