The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 0 |
| 4 | 8 |
| 5 | 0 |
| 6 | 12 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 40 |
| 11 | 0 |
| 12 | 48 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 128 |
| 17 | 0 |
| 18 | 108 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 220 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 336 |
| 29 | 0 |
[1,2,0,8,0,12,0,0,0,40,0,48,0,0,0,128,0,108,0,0,0, 220,0,0,0,0,0,336,0] |