| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 29 |
| 4 | 183 |
| 5 | 1223 |
| 6 | 8525 |
| 7 | 61366 |
| 8 | 453003 |
| 9 | 3412077 |
| 10 | 26124599 |
| 11 | 202748728 |
| 12 | 1591450129 |
| 13 | 12612760009 |
| 14 | 100790253764 |
| 15 | 811227147197 |
| 16 | 6570431009209 |
| 17 | 53512143110041 |
| 18 | 437976298197769 |
| 19 | 3600504527707557 |
| 20 | 29716593448484673 |
[1,1,5,29,183,1223,8525,61366,453003,3412077, 26124599,202748728,1591450129,12612760009, 100790253764,811227147197,6570431009209, 53512143110041,437976298197769,3600504527707557, 29716593448484673] |