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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 37 |
| 2 | 875 |
| 3 | 16865 |
| 4 | 288891 |
| 5 | 4584297 |
| 6 | 68969155 |
| 7 | 997819105 |
| 8 | 14012533931 |
| 9 | 192242650457 |
| 10 | 2588592449235 |
| 11 | 34328260342545 |
| 12 | 449522440061371 |
| 13 | 5824352378123017 |
| 14 | 74789809096438115 |
| 15 | 953017761256677185 |
[1,37,875,16865,288891,4584297,68969155,997819105, 14012533931,192242650457,2588592449235, 34328260342545,449522440061371,5824352378123017, 74789809096438115,953017761256677185] |