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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 70 |
| 4 | 2008 |
| 5 | 209018 |
| 6 | 76000040 |
| 7 | 94978699326 |
| 8 | 410326957417208 |
| 9 | 6211396910763188786 |
| 10 | 334321755307017208207432 |
| 11 | 64835518006826024523658441206 |
| 12 | 45812575197824183928260946747286552 |
[1,2,8,70,2008,209018,76000040,94978699326, 410326957417208,6211396910763188786, 334321755307017208207432, 64835518006826024523658441206, 45812575197824183928260946747286552] |