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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 61 |
| 6 | 151 |
| 7 | 397 |
| 8 | 1153 |
| 9 | 64567 |
| 10 | 64577 |
| 11 | 480967 |
| 12 | 480979 |
| 13 | 9559867 |
| 14 | 9559897 |
| 15 | 9560167 |
| 16 | 189961657 |
| 17 | 189961819 |
| 18 | 189962593 |
| 19 | 189963043 |
| 20 | 189964321 |
| 21 | 189969379 |
| 22 | 514272779 |
| 23 | 514275401 |
| 24 | 1394193607 |
| 25 | 1394194727 |
| 26 | 1394198807 |
| 27 | 10246936003 |
| 28 | 75370121191 |
| 29 | 75370121767 |
| 30 | 75370121839 |
[2,3,7,13,61,151,397,1153,64567,64577,480967, 480979,9559867,9559897,9560167,189961657, 189961819,189962593,189963043,189964321,189969379, 514272779,514275401,1394193607,1394194727, 1394198807,10246936003,75370121191,75370121767, 75370121839] |