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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 5 |
| 3 | 13 |
| 4 | 37 |
| 5 | 73 |
| 6 | 433 |
| 7 | 1297 |
| 8 | 2593 |
| 9 | 10369 |
| 10 | 72577 |
| 11 | 508033 |
| 12 | 1524097 |
| 13 | 12192769 |
| 14 | 73156609 |
| 15 | 146313217 |
| 16 | 438939649 |
| 17 | 2633637889 |
| 18 | 23702740993 |
| 19 | 142216445953 |
| 20 | 1991030243329 |
| 21 | 37829574623233 |
| 22 | 416125320855553 |
| 23 | 1664501283422209 |
| 24 | 6658005133688833 |
| 25 | 126502097540087809 |
| 26 | 506008390160351233 |
[2,3,5,13,37,73,433,1297,2593,10369,72577,508033, 1524097,12192769,73156609,146313217,438939649, 2633637889,23702740993,142216445953,1991030243329, 37829574623233,416125320855553,1664501283422209, 6658005133688833,126502097540087809, 506008390160351233] |