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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 145 |
| 4 | 2825 |
| 5 | 25069 |
| 6 | 174794 |
| 7 | 2345091 |
| 8 | 44474575 |
| 9 | 628376593 |
| 10 | 6864539181 |
| 11 | 75699824370 |
| 12 | 1039086421471 |
| 13 | 15223222698435 |
| 14 | 201831079064335 |
| 15 | 2472305615455965 |
| 16 | 31106656429366406 |
| 17 | 419291616977108585 |
[1,2,145,2825,25069,174794,2345091,44474575, 628376593,6864539181,75699824370,1039086421471, 15223222698435,201831079064335,2472305615455965, 31106656429366406,419291616977108585] |