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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 17 |
| 4 | 13 |
| 5 | 257 |
| 6 | 241 |
| 7 | 65537 |
| 8 | 61681 |
| 9 | 15790321 |
| 10 | 4278255361 |
| 11 | 4562284561 |
| 12 | 291280009243618888211558641 |
| 13 | 18446744069414584321 |
| 14 | 78919881726271091143763623681 |
| 15 | 84179842077657862011867889681 |
| 16 | 20988936657440586486151264256610222593863921 |
[3,5,17,13,257,241,65537,61681,15790321, 4278255361,4562284561,291280009243618888211558641, 18446744069414584321, 78919881726271091143763623681, 84179842077657862011867889681, 20988936657440586486151264256610222593863921] |