| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 41 |
| 3 | 614 |
| 4 | 12281 |
| 5 | 307024 |
| 6 | 9210721 |
| 7 | 322375234 |
| 8 | 12895009361 |
| 9 | 580275421244 |
| 10 | 29013771062201 |
| 11 | 1595757408421054 |
| 12 | 95745444505263241 |
| 13 | 6223453892842110664 |
| 14 | 435641772498947746481 |
| 15 | 32673132937421080986074 |
| 16 | 2613850634993686478885921 |
| 17 | 222177303974463350705303284 |
[1,4,41,614,12281,307024,9210721,322375234, 12895009361,580275421244,29013771062201, 1595757408421054,95745444505263241, 6223453892842110664,435641772498947746481, 32673132937421080986074,2613850634993686478885921, 222177303974463350705303284] |