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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 62 |
| 3 | 457 |
| 4 | 3346 |
| 5 | 24568 |
| 6 | 180575 |
| 7 | 1327102 |
| 8 | 9752326 |
| 9 | 71665377 |
| 10 | 526639966 |
| 11 | 3870071062 |
| 12 | 28439626805 |
| 13 | 208991567034 |
| 14 | 1535796359850 |
| 15 | 11285960160481 |
| 16 | 82936058669080 |
| 17 | 609464300937756 |
| 18 | 4478712154302465 |
| 19 | 32912284659166926 |
[8,62,457,3346,24568,180575,1327102,9752326, 71665377,526639966,3870071062,28439626805, 208991567034,1535796359850,11285960160481, 82936058669080,609464300937756,4478712154302465, 32912284659166926] |