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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 19 |
| 3 | 199 |
| 4 | 2179 |
| 5 | 23957 |
| 6 | 263521 |
| 7 | 2898683 |
| 8 | 31885507 |
| 9 | 350740567 |
| 10 | 3858146203 |
| 11 | 42439608221 |
| 12 | 466835690359 |
| 13 | 5135192593939 |
| 14 | 56487118533317 |
| 15 | 621358303866457 |
| 16 | 6834941342530991 |
| 17 | 75184354767840859 |
| 18 | 827027902446249409 |
| 19 | 9097306926908743457 |
| 20 | 100070376195996178013 |
| 21 | 1100774138155957958123 |
[2,19,199,2179,23957,263521,2898683,31885507, 350740567,3858146203,42439608221,466835690359, 5135192593939,56487118533317,621358303866457, 6834941342530991,75184354767840859, 827027902446249409,9097306926908743457, 100070376195996178013,1100774138155957958123] |