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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 49 |
| 3 | 605 |
| 4 | 8281 |
| 5 | 120125 |
| 6 | 1809025 |
| 7 | 27966125 |
| 8 | 440790025 |
| 9 | 7051890125 |
| 10 | 114160867129 |
| 11 | 1865975723045 |
| 12 | 30743797894681 |
| 13 | 509948702030045 |
| 14 | 8507207970913729 |
| 15 | 142626515754330125 |
| 16 | 2401552098016698025 |
| 17 | 40591712338241826125 |
| 18 | 688413807606268692025 |
| 19 | 11710401759994742685125 |
[1,5,49,605,8281,120125,1809025,27966125, 440790025,7051890125,114160867129,1865975723045, 30743797894681,509948702030045,8507207970913729, 142626515754330125,2401552098016698025, 40591712338241826125,688413807606268692025, 11710401759994742685125] |