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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 34 |
| 4 | 398 |
| 5 | 6988 |
| 6 | 197328 |
| 7 | 8645790 |
| 8 | 598407040 |
| 9 | 64812874208 |
| 10 | 11032788701886 |
| 11 | 2945294560303704 |
| 12 | 1234174982814619524 |
| 13 | 811373195193470813704 |
[1,5,34,398,6988,197328,8645790,598407040, 64812874208,11032788701886,2945294560303704, 1234174982814619524,811373195193470813704] |