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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 5 |
| 12 | 42 |
| 13 | 238 |
| 14 | 1499 |
| 15 | 8635 |
| 16 | 50873 |
| 17 | 294903 |
| 18 | 1724689 |
| 19 | 10094399 |
| 20 | 59679199 |
| 21 | 355198229 |
| 22 | 2136972743 |
| 23 | 12972026795 |
| 24 | 79626155414 |
| 25 | 493684963581 |
| 26 | 3095482758334 |
| 27 | 19612796554079 |
| 28 | 125656314294772 |
| 29 | 813576800235695 |
| 30 | 5325370849930701 |
| 31 | 35223931484275717 |
| 32 | 235474448496780769 |
[1,5,42,238,1499,8635,50873,294903,1724689, 10094399,59679199,355198229,2136972743, 12972026795,79626155414,493684963581, 3095482758334,19612796554079,125656314294772, 813576800235695,5325370849930701, 35223931484275717,235474448496780769] |