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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | -1 |
| 7 | 2 |
| 8 | -6 |
| 9 | 24 |
| 10 | -119 |
| 11 | 717 |
| 12 | -5029 |
| 13 | 40270 |
| 14 | -362606 |
| 15 | 3627037 |
| 16 | -39903738 |
| 17 | 478892051 |
| 18 | -6225994449 |
| 19 | 87167664184 |
| 20 | -1307553837291 |
| 21 | 20921303563234 |
| 22 | -355667626509575 |
| 23 | 6402090252833481 |
| 24 | -121640761396741607 |
| 25 | 2432831275825738669 |
| 26 | -51089718792714854191 |
[1,0,0,0,0,1,-1,2,-6,24,-119,717,-5029,40270, -362606,3627037,-39903738,478892051,-6225994449, 87167664184,-1307553837291,20921303563234, -355667626509575,6402090252833481, -121640761396741607,2432831275825738669, -51089718792714854191] |