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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -14 |
| 2 | 131 |
| 3 | -1080 |
| 4 | 8333 |
| 5 | -61580 |
| 6 | 441893 |
| 7 | -3104136 |
| 8 | 21454675 |
| 9 | -146408362 |
| 10 | 988876484 |
| 11 | -6622729128 |
| 12 | 44039891747 |
| 13 | -291092877360 |
| 14 | 1914072126008 |
| 15 | -12529113820200 |
| 16 | 81687913345362 |
| 17 | -530724605541430 |
| 18 | 3437326269162720 |
| 19 | -22199991545327616 |
| 20 | 143016156285625823 |
[1,-14,131,-1080,8333,-61580,441893,-3104136, 21454675,-146408362,988876484,-6622729128, 44039891747,-291092877360,1914072126008, -12529113820200,81687913345362,-530724605541430, 3437326269162720,-22199991545327616, 143016156285625823] |