The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 8 |
| 4 | 16 |
| 5 | 18 |
| 6 | 64 |
| 7 | 134 |
| 8 | 34 |
| 9 | 170 |
| 10 | 706 |
| 11 | 1854 |
| 12 | 60 |
| 13 | 398 |
| 14 | 2346 |
| 15 | 13198 |
| 16 | 41478 |
| 17 | 102 |
| 18 | 880 |
| 19 | 6832 |
| 20 | 55454 |
| 21 | 382116 |
| 22 | 1424988 |
[2,8,16,18,64,134,34,170,706,1854,60,398,2346, 13198,41478,102,880,6832,55454,382116,1424988] |