The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 104 |
| 3 | 6348 |
| 4 | 714576 |
| 5 | 128844180 |
| 6 | 34036296120 |
| 7 | 12392237356380 |
| 8 | 5948858298045600 |
| 9 | 3640849196296529700 |
| 10 | 2767092887264215797000 |
| 11 | 2556812689319248012075500 |
| 12 | 2822730283098431620059222000 |
| 13 | 3669554568237694851067285432500 |
| 14 | 5548370007316561558557204595815000 |
[0,4,104,6348,714576,128844180,34036296120, 12392237356380,5948858298045600, 3640849196296529700,2767092887264215797000, 2556812689319248012075500, 2822730283098431620059222000, 3669554568237694851067285432500, 5548370007316561558557204595815000] |