The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 216 |
| 4 | 1284 |
| 5 | 7584 |
| 6 | 44556 |
| 7 | 260616 |
| 8 | 1518804 |
| 9 | 8823984 |
| 10 | 51132636 |
| 11 | 295646616 |
| 12 | 1706201124 |
| 13 | 9830779584 |
| 14 | 56564639916 |
| 15 | 325076005416 |
| 16 | 1866287024244 |
| 17 | 10704981330384 |
| 18 | 61356265686396 |
| 19 | 351432308441016 |
| 20 | 2011741878388164 |
[6,36,216,1284,7584,44556,260616,1518804,8823984, 51132636,295646616,1706201124,9830779584, 56564639916,325076005416,1866287024244, 10704981330384,61356265686396,351432308441016, 2011741878388164] |