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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 42 |
| 4 | 429 |
| 5 | 58786 |
| 6 | 742900 |
| 7 | 129644790 |
| 8 | 1767263190 |
| 9 | 343059613650 |
| 10 | 1002242216651368 |
| 11 | 14544636039226909 |
| 12 | 45950804324621742364 |
| 13 | 10113918591637898134020 |
| 14 | 150853479205085351660700 |
| 15 | 33868773757191046886429490 |
| 16 | 116157871455782434250553845880 |
[2,5,42,429,58786,742900,129644790,1767263190, 343059613650,1002242216651368,14544636039226909, 45950804324621742364,10113918591637898134020, 150853479205085351660700, 33868773757191046886429490, 116157871455782434250553845880] |