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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 34 |
| 4 | 307 |
| 5 | 3456 |
| 6 | 46659 |
| 7 | 734882 |
| 8 | 13227995 |
| 9 | 267871036 |
| 10 | 6027206803 |
| 11 | 149176155030 |
| 12 | 4027831914099 |
| 13 | 117816299188472 |
| 14 | 3711283196035523 |
| 15 | 125258162280991858 |
| 16 | 4509378597919760779 |
| 17 | 172486973301491042964 |
| 18 | 6985853719202139488211 |
| 19 | 298650859698906574479278 |
[1,1,5,34,307,3456,46659,734882,13227995, 267871036,6027206803,149176155030,4027831914099, 117816299188472,3711283196035523, 125258162280991858,4509378597919760779, 172486973301491042964,6985853719202139488211, 298650859698906574479278] |