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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 16 |
| 4 | 131 |
| 5 | 1496 |
| 6 | 22482 |
| 7 | 426833 |
| 8 | 9934563 |
| 9 | 277006192 |
| 10 | 9085194458 |
[1,1,3,16,131,1496,22482,426833,9934563,277006192, 9085194458] |