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| n | a(n) |
|---|---|
| 1 | 19 |
| 2 | 37 |
| 3 | 73 |
| 4 | 577 |
| 5 | 1153 |
| 6 | 18433 |
| 7 | 147457 |
| 8 | 1179649 |
| 9 | 77309411329 |
| 10 | 39582418599937 |
| 11 | 79164837199873 |
| 12 | 83010348331692982273 |
| 13 | 332041393326771929089 |
| 14 | 1328165573307087716353 |
| 15 | 21760664753063325144711169 |
| 16 | 196002643346460554954903773880698489798657 |
[19,37,73,577,1153,18433,147457,1179649, 77309411329,39582418599937,79164837199873, 83010348331692982273,332041393326771929089, 1328165573307087716353,21760664753063325144711169, 196002643346460554954903773880698489798657] |