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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 1 |
| 3 | -2 |
| 4 | 15 |
| 5 | -137984787083 |
| 6 | 6902195348070069511711186593994436908244064708018164500799150599256 |
[3,1,-2,15,-137984787083, 69021953480700695117111865939944369082440647080181\ 64500799150599256] |