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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 44 |
| 2 | 2800 |
| 3 | 181952 |
| 4 | 11835136 |
| 5 | 769854464 |
| 6 | 50077757440 |
| 7 | 3257475448832 |
| 8 | 211893401092096 |
| 9 | 13783315988086784 |
| 10 | 896581954180218880 |
| 11 | 58321176214542221312 |
| 12 | 3793696247386269024256 |
| 13 | 246773678989074187157504 |
[1,44,2800,181952,11835136,769854464,50077757440, 3257475448832,211893401092096,13783315988086784, 896581954180218880,58321176214542221312, 3793696247386269024256,246773678989074187157504] |