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A216598 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 16 |
| 3 | 164 |
| 4 | 1866 |
| 5 | 22518 |
| 6 | 282184 |
| 7 | 3630256 |
| 8 | 47614214 |
| 9 | 633835642 |
| 10 | 8537220172 |
[1,2,16,164,1866,22518,282184,3630256,47614214, 633835642,8537220172] |