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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 15 |
| 4 | -80 |
| 5 | 480 |
| 6 | -2832 |
| 7 | 16555 |
| 8 | -94350 |
| 9 | 544050 |
| 10 | -3048150 |
| 11 | 17177355 |
| 12 | -95672700 |
| 13 | 530418150 |
| 14 | -2927403000 |
| 15 | 16080310800 |
| 16 | -87976127220 |
| 17 | 479790094275 |
| 18 | -2607515196300 |
| 19 | 14134142487950 |
| 20 | -76415523881850 |
| 21 | 412207249329390 |
| 22 | -2219152192374700 |
| 23 | 11925605885527275 |
| 24 | -63987288706312050 |
[1,0,15,-80,480,-2832,16555,-94350,544050, -3048150,17177355,-95672700,530418150,-2927403000, 16080310800,-87976127220,479790094275, -2607515196300,14134142487950,-76415523881850, 412207249329390,-2219152192374700, 11925605885527275,-63987288706312050] |