| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 17 |
| 3 | 394 |
| 4 | 21377 |
| 5 | 2537724 |
| 6 | 637139804 |
| 7 | 332102399042 |
| 8 | 355527029604321 |
| 9 | 776504491956507890 |
| 10 | 3445063827264105259985 |
| 11 | 30955227335240072514768936 |
| 12 | 562107762991597803740407081852 |
| 13 | 20594660519301092842327319372549024 |
[1,2,17,394,21377,2537724,637139804,332102399042, 355527029604321,776504491956507890, 3445063827264105259985,30955227335240072514768936, 562107762991597803740407081852, 20594660519301092842327319372549024] |