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| n | a(n) |
|---|---|
| 1 | 421 |
| 2 | 4172 |
| 3 | 49104 |
| 4 | 599869 |
| 5 | 7392190 |
| 6 | 91120318 |
| 7 | 1123772109 |
| 8 | 13857491196 |
| 9 | 170891121600 |
| 10 | 2107379861537 |
| 11 | 25987915305133 |
| 12 | 320477652481276 |
| 13 | 3952074277982088 |
| 14 | 48736235840108773 |
| 15 | 601006370941302525 |
[421,4172,49104,599869,7392190,91120318, 1123772109,13857491196,170891121600,2107379861537, 25987915305133,320477652481276,3952074277982088, 48736235840108773,601006370941302525] |