The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 3780 |
| 16 | 0 |
| 17 | 0 |
| 18 | 46 |
| 19 | 20 |
| 20 | 0 |
| 21 | 16356705 |
| 22 | 910111 |
| 23 | 0 |
| 24 | 1430 |
| 25 | 45077670 |
| 26 | 755820 |
| 27 | 518221227 |
| 28 | 101454300 |
| 29 | 1479060 |
| 30 | 0 |
| 31 | 43816171893552 |
| 32 | 0 |
| 33 | 420732 |
| 34 | 54663267285 |
| 35 | 583180547204 |
| 36 | 181720848039484 |
| 37 | 60770152697265 |
| 38 | 2020797438130380 |
| 39 | 52163677215449 |
| 40 | 31943272670595 |
[1,0,0,0,0,3780,0,0,46,20,0,16356705,910111,0, 1430,45077670,755820,518221227,101454300,1479060, 0,43816171893552,0,420732,54663267285, 583180547204,181720848039484,60770152697265, 2020797438130380,52163677215449,31943272670595] |