| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 3 |
| 3 | 11 |
| 4 | 35 |
| 5 | 139 |
| 6 | 547 |
| 7 | 2251 |
| 8 | 9379 |
| 9 | 39819 |
| 10 | 171171 |
| 11 | 744651 |
| 12 | 3271203 |
| 13 | 14494859 |
| 14 | 64707875 |
| 15 | 290773707 |
| 16 | 1314227619 |
| 17 | 5970720651 |
| 18 | 27251241891 |
| 19 | 124895810251 |
| 20 | 574563563299 |
| 21 | 2652205841547 |
| 22 | 12280754200611 |
| 23 | 57026615362763 |
[1,3,3,11,35,139,547,2251,9379,39819,171171, 744651,3271203,14494859,64707875,290773707, 1314227619,5970720651,27251241891,124895810251, 574563563299,2652205841547,12280754200611, 57026615362763] |