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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 31 |
| 4 | 53 |
| 5 | 331 |
| 6 | 377 |
| 7 | 983 |
| 8 | 1499 |
| 9 | 2609 |
| 10 | 3329 |
| 11 | 6637 |
| 12 | 6997 |
| 13 | 19937 |
| 14 | 34987 |
| 15 | 157961 |
| 16 | 173699 |
| 17 | 256661 |
| 18 | 1349923 |
| 19 | 1616359 |
| 20 | 1993333 |
| 21 | 2199833 |
| 22 | 5794969 |
| 23 | 6906869 |
| 24 | 12204431 |
| 25 | 14223073 |
| 26 | 20666551 |
| 27 | 168499997 |
| 28 | 4819002127 |
| 29 | 7331752277 |
| 30 | 8259275501 |
[1,11,31,53,331,377,983,1499,2609,3329,6637,6997, 19937,34987,157961,173699,256661,1349923,1616359, 1993333,2199833,5794969,6906869,12204431,14223073, 20666551,168499997,4819002127,7331752277, 8259275501] |