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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 15 |
| 3 | 101 |
| 4 | 841 |
| 5 | 8283 |
| 6 | 93815 |
| 7 | 1198029 |
| 8 | 16997041 |
| 9 | 264864419 |
| 10 | 4492081151 |
| 11 | 82299283669 |
| 12 | 1618674299769 |
| 13 | 33997164987019 |
| 14 | 759059595497511 |
| 15 | 17945237236457533 |
| 16 | 447676430154815137 |
| 17 | 11748882878147100691 |
| 18 | 323494584038834863087 |
| 19 | 9322205037165367256837 |
[1,3,15,101,841,8283,93815,1198029,16997041, 264864419,4492081151,82299283669,1618674299769, 33997164987019,759059595497511,17945237236457533, 447676430154815137,11748882878147100691, 323494584038834863087,9322205037165367256837] |