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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 31 |
| 4 | 6721 |
| 5 | 5850271 |
| 6 | 15060446401 |
| 7 | 94396946822431 |
| 8 | 1258620297379341121 |
| 9 | 32323181593821704288671 |
| 10 | 1481630482369728860007652801 |
| 11 | 114129022540066183425609121804831 |
[1,1,31,6721,5850271,15060446401,94396946822431, 1258620297379341121,32323181593821704288671, 1481630482369728860007652801, 114129022540066183425609121804831] |