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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 23 |
| 4 | 47 |
| 5 | 283 |
| 6 | 719 |
| 7 | 1439 |
| 8 | 2879 |
| 9 | 34549 |
| 10 | 138197 |
| 11 | 1266767 |
| 12 | 14619833 |
| 13 | 36449279 |
| 14 | 377982107 |
| 15 | 1432349099 |
[3,7,23,47,283,719,1439,2879,34549,138197,1266767, 14619833,36449279,377982107,1432349099] |