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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 82 |
| 4 | 865 |
| 5 | 9888 |
| 6 | 107514 |
| 7 | 1260442 |
| 8 | 15048493 |
| 9 | 180640864 |
| 10 | 2167406803 |
| 11 | 26004426192 |
| 12 | 311958557356 |
| 13 | 3743219626994 |
| 14 | 44918305209517 |
| 15 | 539021844275470 |
| 16 | 6468267502547329 |
| 17 | 77619174191856096 |
| 18 | 931428840572850954 |
[2,7,82,865,9888,107514,1260442,15048493, 180640864,2167406803,26004426192,311958557356, 3743219626994,44918305209517,539021844275470, 6468267502547329,77619174191856096, 931428840572850954] |