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| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 1764 |
| 3 | 2754 |
| 4 | 18528 |
| 5 | 106110 |
| 6 | 539576 |
| 7 | 2926752 |
| 8 | 16410772 |
| 9 | 88554260 |
| 10 | 477698908 |
| 11 | 2619259634 |
| 12 | 14280032054 |
| 13 | 77486975514 |
| 14 | 422191223508 |
| 15 | 2301460838104 |
| 16 | 12521989484576 |
| 17 | 68163339893844 |
| 18 | 371278088395874 |
| 19 | 2021451066772812 |
[42,1764,2754,18528,106110,539576,2926752, 16410772,88554260,477698908,2619259634, 14280032054,77486975514,422191223508, 2301460838104,12521989484576,68163339893844, 371278088395874,2021451066772812] |