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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | -7 |
| 6 | -47 |
| 7 | -279 |
| 8 | -1343 |
| 9 | -5167 |
| 10 | -8671 |
| 11 | 150833 |
| 12 | 2436545 |
| 13 | 27945609 |
| 14 | 249528945 |
| 15 | 1993449433 |
| 16 | 10176663169 |
| 17 | -9028140255 |
| 18 | -1606374108095 |
| 19 | -31838140005407 |
| 20 | -482969577637247 |
| 21 | -6048738288194407 |
| 22 | -59264468409177327 |
[1,1,1,1,1,-7,-47,-279,-1343,-5167,-8671,150833, 2436545,27945609,249528945,1993449433,10176663169, -9028140255,-1606374108095,-31838140005407, -482969577637247,-6048738288194407, -59264468409177327] |