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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 23 |
| 3 | 541 |
| 4 | 19585 |
| 5 | 962901 |
| 6 | 59969227 |
| 7 | 4526706661 |
| 8 | 401724516641 |
| 9 | 40994441922169 |
| 10 | 4729721311570411 |
| 11 | 608827327842480825 |
| 12 | 86507217246635276065 |
| 13 | 13448830748996370988885 |
| 14 | 2270847762050485928361227 |
| 15 | 413849998079530364443224781 |
| 16 | 80967576778854924208520130241 |
[1,2,23,541,19585,962901,59969227,4526706661, 401724516641,40994441922169,4729721311570411, 608827327842480825,86507217246635276065, 13448830748996370988885,2270847762050485928361227, 413849998079530364443224781, 80967576778854924208520130241] |