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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 15 |
| 3 | 105 |
| 4 | 10185 |
| 5 | 1008315 |
| 6 | 13108095 |
| 7 | 7301208915 |
| 8 | 4095978201315 |
| 9 | 3084271585590195 |
| 10 | 2106557492958103185 |
| 11 | 8221893895015476731055 |
| 12 | 3987618539082506214561675 |
| 13 | 19359888007245567671696932125 |
[5,15,105,10185,1008315,13108095,7301208915, 4095978201315,3084271585590195, 2106557492958103185,8221893895015476731055, 3987618539082506214561675, 19359888007245567671696932125] |