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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 127 |
| 5 | 4369 |
| 6 | 34807 |
| 7 | 20036983 |
| 8 | 2280356863 |
| 9 | 49020204823 |
| 10 | 65967241200001 |
| 11 | 15773461423793767 |
| 12 | 655889589032992201 |
| 13 | 94020690191035873697 |
| 14 | 655782249799531714375489 |
| 15 | 44737200694996264619809969 |
[1,1,7,127,4369,34807,20036983,2280356863, 49020204823,65967241200001,15773461423793767, 655889589032992201,94020690191035873697, 655782249799531714375489, 44737200694996264619809969] |