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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 85 |
| 3 | 341 |
| 4 | 5461 |
| 5 | 22369621 |
| 6 | 178956971 |
| 7 | 5726623061 |
| 8 | 45812984491 |
| 9 | 91625968981 |
| 10 | 733007751851 |
| 11 | 46912496118443 |
| 12 | 187649984473771 |
| 13 | 3002399751580331 |
| 14 | 1537228672809129301 |
| 15 | 49191317529892137643 |
| 16 | 787061080478274202283 |
| 17 | 3148244321913096809131 |
[21,85,341,5461,22369621,178956971,5726623061, 45812984491,91625968981,733007751851, 46912496118443,187649984473771,3002399751580331, 1537228672809129301,49191317529892137643, 787061080478274202283,3148244321913096809131] |