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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 41 |
| 3 | 627 |
| 4 | 12759 |
| 5 | 324543 |
| 6 | 9906453 |
| 7 | 352785933 |
| 8 | 14358074211 |
| 9 | 657405969075 |
| 10 | 33444798498657 |
| 11 | 1871613674744553 |
| 12 | 114259520317835871 |
| 13 | 7556674046930376111 |
| 14 | 538212358684663414317 |
| 15 | 41071433946325564954581 |
| 16 | 3343141735414440335583003 |
[1,4,41,627,12759,324543,9906453,352785933, 14358074211,657405969075,33444798498657, 1871613674744553,114259520317835871, 7556674046930376111,538212358684663414317, 41071433946325564954581,3343141735414440335583003] |