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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 64 |
| 4 | 2401 |
| 5 | 7776 |
| 6 | 2985984 |
| 7 | 2097152 |
| 8 | 2562890625 |
| 9 | 10604499373 |
| 10 | 3570467226624 |
| 11 | 743008370688 |
| 12 | 232218265089212416 |
| 13 | 793714773254144 |
| 14 | 21035720123168587776 |
| 15 | 504857282956046106624 |
| 16 | 727423121747185263828481 |
| 17 | 2185911559738696531968 |
| 18 | 43567528752021332753202420081 |
[1,9,64,2401,7776,2985984,2097152,2562890625, 10604499373,3570467226624,743008370688, 232218265089212416,793714773254144, 21035720123168587776,504857282956046106624, 727423121747185263828481,2185911559738696531968, 43567528752021332753202420081] |