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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 21 |
| 3 | 86 |
| 4 | 341 |
| 5 | 1366 |
| 6 | 5461 |
| 7 | 21846 |
| 8 | 87381 |
| 9 | 349526 |
| 10 | 1398101 |
| 11 | 5592406 |
| 12 | 22369621 |
| 13 | 89478486 |
| 14 | 357913941 |
| 15 | 1431655766 |
| 16 | 5726623061 |
| 17 | 22906492246 |
| 18 | 91625968981 |
| 19 | 366503875926 |
| 20 | 1466015503701 |
| 21 | 5864062014806 |
| 22 | 23456248059221 |
| 23 | 93824992236886 |
| 24 | 375299968947541 |
| 25 | 1501199875790166 |
[6,21,86,341,1366,5461,21846,87381,349526,1398101, 5592406,22369621,89478486,357913941,1431655766, 5726623061,22906492246,91625968981,366503875926, 1466015503701,5864062014806,23456248059221, 93824992236886,375299968947541,1501199875790166] |