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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 25 |
| 4 | 349 |
| 5 | 6821 |
| 6 | 171421 |
| 7 | 5265625 |
| 8 | 191160201 |
| 9 | 8007548617 |
| 10 | 380157603481 |
| 11 | 20171371753061 |
| 12 | 1182973489103869 |
| 13 | 75984447924612397 |
| 14 | 5305029326492409333 |
| 15 | 400014338565211619761 |
| 16 | 32396515980658185762961 |
[1,1,3,25,349,6821,171421,5265625,191160201, 8007548617,380157603481,20171371753061, 1182973489103869,75984447924612397, 5305029326492409333,400014338565211619761, 32396515980658185762961] |