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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 37 |
| 2 | 925 |
| 3 | 19525 |
| 4 | 375661 |
| 5 | 6828757 |
| 6 | 119609725 |
| 7 | 2042733925 |
| 8 | 34274529421 |
| 9 | 567869330677 |
| 10 | 9323118394525 |
| 11 | 152047784616325 |
| 12 | 2467581667044781 |
| 13 | 39901653896747797 |
| 14 | 643493505828795325 |
| 15 | 10356906506162786725 |
| 16 | 166444482073618177741 |
| 17 | 2671936126059753592117 |
[1,37,925,19525,375661,6828757,119609725, 2042733925,34274529421,567869330677,9323118394525, 152047784616325,2467581667044781, 39901653896747797,643493505828795325, 10356906506162786725,166444482073618177741, 2671936126059753592117] |