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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 33 |
| 4 | 91 |
| 5 | 989 |
| 6 | 2727 |
| 7 | 29637 |
| 8 | 81719 |
| 9 | 888121 |
| 10 | 2448843 |
| 11 | 26613993 |
| 12 | 73383571 |
| 13 | 797531669 |
| 14 | 2199058287 |
| 15 | 23899336077 |
| 16 | 65898365039 |
| 17 | 716182550641 |
| 18 | 1974751892883 |
| 19 | 21461577183153 |
| 20 | 59176658421451 |
| 21 | 643131132943949 |
| 22 | 1773325000750647 |
| 23 | 19272472411135317 |
| 24 | 53140573364097959 |
[1,3,33,91,989,2727,29637,81719,888121,2448843, 26613993,73383571,797531669,2199058287, 23899336077,65898365039,716182550641, 1974751892883,21461577183153,59176658421451, 643131132943949,1773325000750647, 19272472411135317,53140573364097959] |