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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 31 |
| 3 | 7565 |
| 4 | 241837 |
| 5 | 755989457 |
| 6 | 755889457 |
| 7 | 12705011703799 |
| 8 | 406547611705943 |
| 9 | 98792790681344149 |
| 10 | 98791774426324117 |
| 11 | 15910615688635928566967 |
| 12 | 15910549913780913466967 |
| 13 | 5907492176026179821253778331 |
[1,31,7565,241837,755989457,755889457, 12705011703799,406547611705943,98792790681344149, 98791774426324117,15910615688635928566967, 15910549913780913466967, 5907492176026179821253778331] |