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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 19 |
| 4 | 113 |
| 5 | 872 |
| 6 | 2357 |
| 7 | 619 |
| 8 | 831479 |
| 9 | 645109 |
| 10 | 28011357 |
| 11 | 97768316 |
| 12 | 377282539 |
| 13 | 469754781 |
| 14 | 403248635900 |
[1,5,19,113,872,2357,619,831479,645109,28011357, 97768316,377282539,469754781,403248635900] |