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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 122 |
| 3 | 463 |
| 4 | 11985 |
| 5 | 85456 |
| 6 | 1262166 |
| 7 | 12018742 |
| 8 | 145326748 |
| 9 | 1540766090 |
| 10 | 17495016342 |
| 11 | 191731126832 |
| 12 | 2138972609189 |
| 13 | 23652975370501 |
| 14 | 262682339212290 |
| 15 | 2911255335387883 |
| 16 | 32296421465575573 |
| 17 | 358120616523262016 |
| 18 | 3971885483375619384 |
| 19 | 44047530724737577400 |
[1,1,122,463,11985,85456,1262166,12018742, 145326748,1540766090,17495016342,191731126832, 2138972609189,23652975370501,262682339212290, 2911255335387883,32296421465575573, 358120616523262016,3971885483375619384, 44047530724737577400] |