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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -2 |
| 2 | -3 |
| 3 | 6 |
| 4 | 20 |
| 5 | -5 |
| 6 | -105 |
| 7 | -98 |
| 8 | 420 |
| 9 | 1008 |
| 10 | -990 |
| 11 | -6501 |
| 12 | -2574 |
| 13 | 31603 |
| 14 | 52052 |
| 15 | -107250 |
| 16 | -411944 |
| 17 | 81328 |
| 18 | 2343042 |
| 19 | 2413456 |
| 20 | -9883800 |
| 21 | -25327722 |
| 22 | 23371634 |
| 23 | 168185131 |
| 24 | 77113020 |
| 25 | -835281800 |
| 26 | -1452148815 |
| 27 | 2847865635 |
| 28 | 11561517870 |
| 29 | -1613666430 |
| 30 | -66318892875 |
| 31 | -72637680690 |
| 32 | 280330495200 |
| 33 | 750725215020 |
[0,-2,-3,6,20,-5,-105,-98,420,1008,-990,-6501, -2574,31603,52052,-107250,-411944,81328,2343042, 2413456,-9883800,-25327722,23371634,168185131, 77113020,-835281800,-1452148815,2847865635, 11561517870,-1613666430,-66318892875,-72637680690, 280330495200,750725215020] |