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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 18 |
| 2 | 82 |
| 3 | -7236 |
| 4 | -189780 |
| 5 | 3588408 |
| 6 | 294225144 |
| 7 | 85684176 |
| 8 | -496875078768 |
| 9 | -9109635982560 |
| 10 | 918220473870624 |
| 11 | 38573287607466432 |
| 12 | -1749983724509205312 |
| 13 | -143516534253248214144 |
| 14 | 2922151180747492056960 |
| 15 | 538832739303459806545152 |
| 16 | -908419478651119648952064 |
[1,18,82,-7236,-189780,3588408,294225144,85684176, -496875078768,-9109635982560,918220473870624, 38573287607466432,-1749983724509205312, -143516534253248214144,2922151180747492056960, 538832739303459806545152, -908419478651119648952064] |