| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | 8 |
| 4 | 44 |
| 5 | 192 |
| 6 | -323 |
| 7 | 289 |
| 8 | 4641 |
| 9 | 10520 |
| 10 | 4400 |
| 11 | -68280 |
| 12 | 484561 |
| 13 | 808201 |
| 14 | 488157 |
| 15 | -2948752 |
| 16 | 17408204 |
| 17 | 130987992 |
| 18 | -65477123 |
| 19 | 11580409 |
| 20 | 658776561 |
| 21 | 9777980240 |
| 22 | 8114321600 |
| 23 | -39315892560 |
| 24 | 138239377921 |
| 25 | 475273738801 |
| 26 | 1607488031517 |
| 27 | -3426809717512 |
| 28 | 4583117135564 |
[1,-3,8,44,192,-323,289,4641,10520,4400,-68280, 484561,808201,488157,-2948752,17408204,130987992, -65477123,11580409,658776561,9777980240, 8114321600,-39315892560,138239377921,475273738801, 1607488031517,-3426809717512,4583117135564] |