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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 105 |
| 3 | 2766 |
| 4 | 49702 |
| 5 | 784878 |
| 6 | 13322548 |
| 7 | 232027264 |
| 8 | 4056338728 |
| 9 | 70402715640 |
| 10 | 1221782263634 |
| 11 | 21228810396872 |
| 12 | 368923543916728 |
| 13 | 6410003754557834 |
| 14 | 111371494441358332 |
| 15 | 1935130749075453956 |
[5,105,2766,49702,784878,13322548,232027264, 4056338728,70402715640,1221782263634, 21228810396872,368923543916728,6410003754557834, 111371494441358332,1935130749075453956] |