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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 3328 |
| 6 | 3329 |
| 7 | 4097 |
| 8 | 12429 |
| 9 | 12430 |
| 10 | 12431 |
| 11 | 18587 |
| 12 | 44257 |
| 13 | 112896 |
| 14 | 129638 |
| 15 | 4264691 |
| 16 | 144941960 |
| 17 | 144941961 |
| 18 | 144941962 |
[1,2,4,7,3328,3329,4097,12429,12430,12431,18587, 44257,112896,129638,4264691,144941960,144941961, 144941962] |