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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | -8 |
| 2 | 54 |
| 3 | -389 |
| 4 | 2834 |
| 5 | -20673 |
| 6 | 150825 |
| 7 | -1100401 |
| 8 | 8028410 |
| 9 | -58574450 |
| 10 | 427353149 |
| 11 | -3117924532 |
| 12 | 22748056061 |
| 13 | -165967472679 |
| 14 | 1210881576595 |
| 15 | -8834467193304 |
| 16 | 64455362190778 |
| 17 | -470259679983109 |
| 18 | 3430966161717678 |
| 19 | -25031975531635101 |
| 20 | 182630713764509309 |
[3,-8,54,-389,2834,-20673,150825,-1100401,8028410, -58574450,427353149,-3117924532,22748056061, -165967472679,1210881576595,-8834467193304, 64455362190778,-470259679983109,3430966161717678, -25031975531635101,182630713764509309] |