| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 2 |
| 3 | 0 |
| 4 | 2 |
| 5 | 4 |
| 6 | 4 |
| 7 | 12 |
| 8 | 16 |
| 9 | 32 |
| 10 | 56 |
| 11 | 96 |
| 12 | 176 |
| 13 | 304 |
| 14 | 544 |
| 15 | 960 |
| 16 | 1696 |
| 17 | 3008 |
| 18 | 5312 |
| 19 | 9408 |
| 20 | 16640 |
| 21 | 29440 |
| 22 | 52096 |
| 23 | 92160 |
| 24 | 163072 |
| 25 | 288512 |
| 26 | 510464 |
| 27 | 903168 |
| 28 | 1597952 |
| 29 | 2827264 |
| 30 | 5002240 |
| 31 | 8850432 |
| 32 | 15659008 |
| 33 | 27705344 |
| 34 | 49018880 |
| 35 | 86728704 |
| 36 | 153448448 |
| 37 | 271495168 |
| 38 | 480354304 |
[1,-1,2,0,2,4,4,12,16,32,56,96,176,304,544,960, 1696,3008,5312,9408,16640,29440,52096,92160, 163072,288512,510464,903168,1597952,2827264, 5002240,8850432,15659008,27705344,49018880, 86728704,153448448,271495168,480354304] |