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| n | a(n) |
|---|---|
| 1 | 22 |
| 2 | 484 |
| 3 | 990 |
| 4 | 2025 |
| 5 | 22995 |
| 6 | 261121 |
| 7 | 768544 |
| 8 | 2262016 |
| 9 | 18608992 |
| 10 | 153091129 |
| 11 | 558232641 |
| 12 | 2035543689 |
| 13 | 13946476806 |
| 14 | 95553937924 |
| 15 | 397367788702 |
| 16 | 1652481969121 |
| 17 | 10150368975235 |
| 18 | 62348632093225 |
| 19 | 281328849436320 |
| 20 | 1269409109197824 |
[22,484,990,2025,22995,261121,768544,2262016, 18608992,153091129,558232641,2035543689, 13946476806,95553937924,397367788702, 1652481969121,10150368975235,62348632093225, 281328849436320,1269409109197824] |