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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -17 |
| 2 | 136 |
| 3 | -697 |
| 4 | 2669 |
| 5 | -8517 |
| 6 | 24361 |
| 7 | -64549 |
| 8 | 160140 |
| 9 | -375564 |
| 10 | 842078 |
| 11 | -1818932 |
| 12 | 3800537 |
| 13 | -7709449 |
| 14 | 15239497 |
| 15 | -29440226 |
| 16 | 55697542 |
| 17 | -103382254 |
| 18 | 188589925 |
| 19 | -338602243 |
| 20 | 599066162 |
| 21 | -1045509435 |
| 22 | 1801660255 |
| 23 | -3068201310 |
[1,-17,136,-697,2669,-8517,24361,-64549,160140, -375564,842078,-1818932,3800537,-7709449,15239497, -29440226,55697542,-103382254,188589925, -338602243,599066162,-1045509435,1801660255, -3068201310] |