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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 15 |
| 3 | 105 |
| 4 | 10185 |
| 5 | 1018500 |
| 6 | 101850000 |
| 7 | 10185000000 |
| 8 | 1018500000000 |
| 9 | 101850000000000 |
| 10 | 10185000000000000 |
| 11 | 1018500000000000000 |
| 12 | 101850000000000000000 |
| 13 | 10185000000000000000000 |
[5,15,105,10185,1018500,101850000,10185000000, 1018500000000,101850000000000,10185000000000000, 1018500000000000000,101850000000000000000, 10185000000000000000000] |