The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 12 |
| 5 | 48 |
| 6 | 201 |
| 7 | 1063 |
| 8 | 8179 |
| 9 | 95635 |
| 10 | 1618098 |
| 11 | 39391794 |
| 12 | 1372677618 |
| 13 | 68131562100 |
| 14 | 4826887174456 |
[1,4,9,12,48,201,1063,8179,95635,1618098,39391794, 1372677618,68131562100,4826887174456] |