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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -15 |
| 2 | 271 |
| 3 | -8215 |
| 4 | 423091 |
| 5 | -35126715 |
| 6 | 4192844111 |
| 7 | -652228720015 |
| 8 | 125163350892331 |
| 9 | -28804173376146115 |
| 10 | 7819440342923915751 |
| 11 | -2475114876516159269015 |
| 12 | 904874211609774006906371 |
| 13 | -378873316356391869172808715 |
| 14 | 180284311084647508248207800191 |
| 15 | -96800336889159425029828580541215 |
[1,-15,271,-8215,423091,-35126715,4192844111, -652228720015,125163350892331,-28804173376146115, 7819440342923915751,-2475114876516159269015, 904874211609774006906371, -378873316356391869172808715, 180284311084647508248207800191, -96800336889159425029828580541215] |