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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | -24 |
| 4 | 448 |
| 5 | -640 |
| 6 | -658944 |
| 7 | 56992768 |
| 8 | -2831024128 |
| 9 | -86998155264 |
| 10 | 51519425740800 |
| 11 | -9075812362878976 |
| 12 | 917148920337924096 |
| 13 | 26667007293767286784 |
| 14 | -33058738844745936666624 |
| 15 | 2573727989288825813729280 |
| 16 | 4259701574179331481681264640 |
[0,1,0,-24,448,-640,-658944,56992768,-2831024128, -86998155264,51519425740800,-9075812362878976, 917148920337924096,26667007293767286784, -33058738844745936666624, 2573727989288825813729280, 4259701574179331481681264640] |