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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 42 |
| 4 | 418 |
| 5 | 7166 |
| 6 | 196648 |
| 7 | 9262421 |
| 8 | 735124501 |
| 9 | 97462705054 |
| 10 | 21772941967902 |
| 11 | 8177116027167826 |
| 12 | 5158458258244584078 |
| 13 | 5470968994479723869739 |
| 14 | 9752808741716616515809575 |
[1,2,8,42,418,7166,196648,9262421,735124501, 97462705054,21772941967902,8177116027167826, 5158458258244584078,5470968994479723869739, 9752808741716616515809575] |