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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 11 |
| 3 | 59 |
| 4 | 71 |
| 5 | 191 |
| 6 | 1151 |
| 7 | 14591 |
| 8 | 15359 |
| 9 | 138239 |
| 10 | 675839 |
| 11 | 737279 |
| 12 | 786431 |
| 13 | 22118399 |
| 14 | 36175871 |
| 15 | 63700991 |
| 16 | 138412031 |
| 17 | 169869311 |
| 18 | 1321205759 |
| 19 | 4076863487 |
| 20 | 10871635967 |
| 21 | 24159191039 |
| 22 | 370440929279 |
| 23 | 1793819934719 |
| 24 | 2348273369087 |
| 25 | 14637248544767 |
| 26 | 56358560858111 |
| 27 | 79164837199871 |
| 28 | 659706976665599 |
[3,11,59,71,191,1151,14591,15359,138239,675839, 737279,786431,22118399,36175871,63700991, 138412031,169869311,1321205759,4076863487, 10871635967,24159191039,370440929279, 1793819934719,2348273369087,14637248544767, 56358560858111,79164837199871,659706976665599] |