| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 17 |
| 4 | 85 |
| 5 | 329 |
| 6 | 1645 |
| 7 | 6913 |
| 8 | 34565 |
| 9 | 152729 |
| 10 | 763645 |
| 11 | 3482097 |
| 12 | 17410485 |
| 13 | 81061001 |
| 14 | 405305005 |
| 15 | 1914744673 |
| 16 | 9573723365 |
| 17 | 45711939705 |
| 18 | 228559698525 |
| 19 | 1100105774033 |
| 20 | 5500528870165 |
| 21 | 26640170717033 |
| 22 | 133200853585165 |
| 23 | 648290412642625 |
| 24 | 3241452063213125 |
| 25 | 15838421978898265 |
| 26 | 79192109894491325 |
[1,1,5,17,85,329,1645,6913,34565,152729,763645, 3482097,17410485,81061001,405305005,1914744673, 9573723365,45711939705,228559698525,1100105774033, 5500528870165,26640170717033,133200853585165, 648290412642625,3241452063213125, 15838421978898265,79192109894491325] |