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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -2 |
| 3 | 1 |
| 4 | -8 |
| 5 | 12 |
| 6 | 1 |
| 7 | -38 |
| 8 | 252 |
| 9 | -360 |
| 10 | 1 |
| 11 | -248 |
| 12 | 8232 |
| 13 | -53280 |
| 14 | 75600 |
| 15 | 1 |
| 16 | -2558 |
| 17 | 581112 |
| 18 | -19069200 |
| 19 | 123152400 |
| 20 | -174636000 |
| 21 | 1 |
| 22 | -32588 |
| 23 | 77397852 |
| 24 | -17469862560 |
| 25 | 572771228400 |
| 26 | -3698441208000 |
| 27 | 5244319080000 |
| 28 | 1 |
| 29 | -543098 |
| 30 | 16713897732 |
| 31 | -39529847287080 |
| 32 | 8919112306734000 |
| 33 | -292409138251692000 |
| 34 | 1888096465415160000 |
| 35 | -2677277333530800000 |
[1,1,-2,1,-8,12,1,-38,252,-360,1,-248,8232,-53280, 75600,1,-2558,581112,-19069200,123152400, -174636000,1,-32588,77397852,-17469862560, 572771228400,-3698441208000,5244319080000,1, -543098,16713897732,-39529847287080, 8919112306734000,-292409138251692000, 1888096465415160000,-2677277333530800000] |