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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 75 |
| 5 | 1099 |
| 6 | 33867 |
| 7 | 2131019 |
| 8 | 270566475 |
| 9 | 68990043211 |
| 10 | 35253362132043 |
| 11 | 36064050381096011 |
| 12 | 73823040345219302475 |
| 13 | 302305277944002512979019 |
| 14 | 2476182383848704552311227467 |
| 15 | 40567295389687189552446813799499 |
| 16 | 1329268563080305560093359507094144075 |
[0,1,3,11,75,1099,33867,2131019,270566475, 68990043211,35253362132043,36064050381096011, 73823040345219302475,302305277944002512979019, 2476182383848704552311227467, 40567295389687189552446813799499, 1329268563080305560093359507094144075] |