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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 2 |
| 5 | 61 |
| 6 | 71 |
| 7 | 684847 |
| 8 | 8621 |
| 9 | 4768743913 |
| 10 | 192769238731 |
| 11 | 31302497 |
| 12 | 3624013907027 |
| 13 | 3389284413733950439 |
| 14 | 20347152500093 |
| 15 | 73535243111830065216714893617 |
| 16 | 579021662547635771462791245283 |
| 17 | 38283945111344558723552263341142779661 |
| 18 | 60296900399609972459 |
| 19 | 271233083114844569997128597 |
| 20 | 1382959355737627871079165208413804169 |
[1,2,61,71,684847,8621,4768743913,192769238731, 31302497,3624013907027,3389284413733950439, 20347152500093,73535243111830065216714893617, 579021662547635771462791245283, 38283945111344558723552263341142779661, 60296900399609972459,271233083114844569997128597, 1382959355737627871079165208413804169] |