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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 145 |
| 4 | 7999 |
| 5 | 1103041 |
| 6 | 365051647 |
| 7 | 281898887425 |
| 8 | 497570152386559 |
| 9 | 1976049386530790401 |
| 10 | 17439288184770966867967 |
| 11 | 338596445913833207323643905 |
| 12 | 14343481992486219718322674565119 |
[1,1,7,145,7999,1103041,365051647,281898887425, 497570152386559,1976049386530790401, 17439288184770966867967, 338596445913833207323643905, 14343481992486219718322674565119] |