| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 0 |
| 8 | 36 |
| 9 | 36 |
| 10 | 0 |
| 11 | 0 |
| 12 | 360 |
| 13 | 888 |
| 14 | 360 |
| 15 | 0 |
| 16 | 0 |
| 17 | 2688 |
| 18 | 10896 |
| 19 | 10896 |
| 20 | 2688 |
| 21 | 0 |
| 22 | 0 |
| 23 | 17280 |
| 24 | 108000 |
| 25 | 186576 |
| 26 | 108000 |
| 27 | 17280 |
| 28 | 0 |
| 29 | 0 |
| 30 | 101376 |
| 31 | 959040 |
| 32 | 2700432 |
| 33 | 2700432 |
| 34 | 959040 |
| 35 | 101376 |
| 36 | 0 |
| 37 | 0 |
| 38 | 559104 |
| 39 | 7952256 |
| 40 | 35485776 |
| 41 | 58038768 |
| 42 | 35485776 |
| 43 | 7952256 |
| 44 | 559104 |
| 45 | 0 |
| 46 | 0 |
[0,0,0,0,2,0,0,36,36,0,0,360,888,360,0,0,2688, 10896,10896,2688,0,0,17280,108000,186576,108000, 17280,0,0,101376,959040,2700432,2700432,959040, 101376,0,0,559104,7952256,35485776,58038768, 35485776,7952256,559104,0,0] |