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| n | a(n) |
|---|---|
| 2 | 3 |
| 3 | 14 |
| 4 | 20 |
| 5 | 121 |
| 6 | 631 |
| 7 | 3593 |
| 8 | 19440 |
| 9 | 113290 |
| 10 | 670273 |
| 11 | 3972293 |
| 12 | 23325150 |
| 13 | 136469423 |
| 14 | 803743103 |
| 15 | 4797298204 |
| 16 | 29074946027 |
[3,14,20,121,631,3593,19440,113290,670273,3972293, 23325150,136469423,803743103,4797298204, 29074946027] |