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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 6 |
| 4 | 3 |
| 5 | 27 |
| 6 | 28 |
| 7 | 324 |
| 8 | 338 |
| 9 | 5991 |
| 10 | 6875 |
| 11 | 228512 |
| 12 | 322056 |
| 13 | 17782554 |
| 14 | 30487207 |
| 15 | 2704389848 |
| 16 | 5451449965 |
| 17 | 819155081866 |
| 18 | 1981437279113 |
| 19 | 497332226754331 |
| 20 | 1457925225531230 |
| 21 | 603767469974886673 |
| 22 | 2133983730438871395 |
[1,2,2,6,3,27,28,324,338,5991,6875,228512,322056, 17782554,30487207,2704389848,5451449965, 819155081866,1981437279113,497332226754331, 1457925225531230,603767469974886673, 2133983730438871395] |