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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 35 |
| 3 | 97 |
| 4 | 271 |
| 5 | 757 |
| 6 | 2115 |
| 7 | 5913 |
| 8 | 16535 |
| 9 | 46237 |
| 10 | 129291 |
| 11 | 361537 |
| 12 | 1010975 |
| 13 | 2827013 |
| 14 | 7905235 |
| 15 | 22105577 |
| 16 | 61814311 |
| 17 | 172852717 |
| 18 | 483351835 |
| 19 | 1351607313 |
| 20 | 3779529135 |
| 21 | 10568780117 |
| 22 | 29553711331 |
| 23 | 82641690297 |
| 24 | 231092768695 |
| 25 | 646209770813 |
[13,35,97,271,757,2115,5913,16535,46237,129291, 361537,1010975,2827013,7905235,22105577,61814311, 172852717,483351835,1351607313,3779529135, 10568780117,29553711331,82641690297,231092768695, 646209770813] |