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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 73 |
| 4 | 1063 |
| 5 | 20041 |
| 6 | 464167 |
| 7 | 12752713 |
| 8 | 405439783 |
| 9 | 14641740361 |
| 10 | 592050220327 |
| 11 | 26499885031753 |
| 12 | 1300723181304103 |
| 13 | 69470729022993481 |
| 14 | 4010891467932629287 |
| 15 | 248920020505516389193 |
| 16 | 16525139232054244298023 |
| 17 | 1168557027163488299171401 |
[1,1,7,73,1063,20041,464167,12752713,405439783, 14641740361,592050220327,26499885031753, 1300723181304103,69470729022993481, 4010891467932629287,248920020505516389193, 16525139232054244298023,1168557027163488299171401] |