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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 121 |
| 3 | 4411 |
| 4 | 283073 |
| 5 | 28318137 |
| 6 | 4076415425 |
| 7 | 798519164779 |
| 8 | 204292676593353 |
| 9 | 66150225395814649 |
| 10 | 26444888796754193841 |
| 11 | 12792566645739144488693 |
| 12 | 7364969554345555373419625 |
| 13 | 4976538708651698959601499559 |
| 14 | 3900052284443403730374391636689 |
[1,7,121,4411,283073,28318137,4076415425, 798519164779,204292676593353,66150225395814649, 26444888796754193841,12792566645739144488693, 7364969554345555373419625, 4976538708651698959601499559, 3900052284443403730374391636689] |