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| n | a(n) |
|---|---|
| 2 | 3 |
| 3 | 7 |
| 4 | 41 |
| 5 | 184 |
| 6 | 801 |
| 7 | 4749 |
| 8 | 30806 |
| 9 | 195875 |
| 10 | 1262979 |
| 11 | 8295251 |
| 12 | 55547680 |
| 13 | 376100279 |
| 14 | 2557852318 |
| 15 | 17464618397 |
| 16 | 119881121776 |
[3,7,41,184,801,4749,30806,195875,1262979,8295251, 55547680,376100279,2557852318,17464618397, 119881121776] |