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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 39 |
| 4 | 314 |
| 5 | 3379 |
| 6 | 45440 |
| 7 | 733335 |
| 8 | 13807364 |
| 9 | 297105507 |
| 10 | 7192224540 |
| 11 | 193452015049 |
| 12 | 5723688147650 |
| 13 | 184742675924105 |
| 14 | 6459822765521016 |
| 15 | 243253254143586291 |
| 16 | 9814313764465482774 |
| 17 | 422366963490734937123 |
| 18 | 19312961877700115922410 |
| 19 | 935042624229107088382095 |
[2,7,39,314,3379,45440,733335,13807364,297105507, 7192224540,193452015049,5723688147650, 184742675924105,6459822765521016, 243253254143586291,9814313764465482774, 422366963490734937123,19312961877700115922410, 935042624229107088382095] |