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| n | a(n) |
|---|---|
| 1 | 54 |
| 2 | 530 |
| 3 | 6412 |
| 4 | 91448 |
| 5 | 1206656 |
| 6 | 15009944 |
| 7 | 173151602 |
| 8 | 1874799298 |
| 9 | 19099723173 |
| 10 | 185262737712 |
[54,530,6412,91448,1206656,15009944,173151602, 1874799298,19099723173,185262737712] |