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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 900 |
| 3 | 44517 |
| 4 | 2059071 |
| 5 | 88808673 |
| 6 | 3660830427 |
| 7 | 145301219913 |
| 8 | 5600451934263 |
| 9 | 210693318976809 |
| 10 | 7769692483541913 |
| 11 | 281740543748278353 |
| 12 | 10071425144186095647 |
| 13 | 355636339335520541583 |
| 14 | 12425488243555670885277 |
[15,900,44517,2059071,88808673,3660830427, 145301219913,5600451934263,210693318976809, 7769692483541913,281740543748278353, 10071425144186095647,355636339335520541583, 12425488243555670885277] |