The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 1 |
| 4 | 12 |
| 5 | 186 |
| 6 | 4 |
| 7 | 86 |
| 8 | 4860 |
| 9 | 114 |
| 10 | 8 |
| 11 | 2 |
| 12 | 8 |
| 13 | 288 |
| 14 | 4632 |
| 15 | 205832 |
| 16 | 2968 |
| 17 | 124 |
| 18 | 16 |
| 19 | 84 |
[1,4,1,12,186,4,86,4860,114,8,2,8,288,4632,205832, 2968,124,16,84] |