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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | -3 |
| 4 | -10 |
| 5 | -35 |
| 6 | -186 |
| 7 | -1162 |
| 8 | -6980 |
| 9 | -37893 |
| 10 | -170170 |
| 11 | -420926 |
| 12 | 2820168 |
| 13 | 58820034 |
| 14 | 648789218 |
| 15 | 5870211150 |
| 16 | 49367781216 |
| 17 | 424549221251 |
| 18 | 4031944331166 |
| 19 | 42858283306334 |
| 20 | 485093040406600 |
| 21 | 5516989209285204 |
| 22 | 60784199053120378 |
| 23 | 635030292370785486 |
| 24 | 6149124209685347592 |
[1,1,0,-3,-10,-35,-186,-1162,-6980,-37893,-170170, -420926,2820168,58820034,648789218,5870211150, 49367781216,424549221251,4031944331166, 42858283306334,485093040406600,5516989209285204, 60784199053120378,635030292370785486, 6149124209685347592] |