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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 1 |
| 3 | 22 |
| 4 | 16 |
| 5 | 316 |
| 6 | 10 |
| 7 | 4264 |
| 8 | 184 |
| 9 | 2584 |
| 10 | 124 |
| 11 | 756064 |
| 12 | 148 |
| 13 | 10050496 |
| 14 | 1624 |
| 15 | 19216 |
| 16 | 31264 |
| 17 | 1775616256 |
| 18 | 2152 |
| 19 | 23600633344 |
| 20 | 25936 |
| 21 | 3343936 |
| 22 | 285856 |
| 23 | 4169384372224 |
| 24 | 29968 |
| 25 | 175371467776 |
| 26 | 3798976 |
| 27 | 12957013504 |
| 28 | 4580416 |
[2,1,22,16,316,10,4264,184,2584,124,756064,148, 10050496,1624,19216,31264,1775616256,2152, 23600633344,25936,3343936,285856,4169384372224, 29968,175371467776,3798976,12957013504,4580416] |