The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 7 |
| 2 | 16 |
| 3 | 23 |
| 4 | 2684 |
| 5 | 5391 |
| 6 | 8075 |
| 7 | 13466 |
| 8 | 35007 |
| 9 | 48473 |
| 10 | 83480 |
| 11 | 131953 |
| 12 | 347386 |
| 13 | 7079673 |
| 14 | 7427059 |
| 15 | 14506732 |
| 16 | 21933791 |
| 17 | 189977060 |
| 18 | 211910851 |
| 19 | 613798762 |
| 20 | 1439508375 |
| 21 | 2053307137 |
| 22 | 5546122649 |
| 23 | 96337392170 |
| 24 | 1739619181709 |
| 25 | 20971767572678 |
| 26 | 22711386754387 |
| 27 | 66394541081452 |
[2,7,16,23,2684,5391,8075,13466,35007,48473,83480, 131953,347386,7079673,7427059,14506732,21933791, 189977060,211910851,613798762,1439508375, 2053307137,5546122649,96337392170,1739619181709, 20971767572678,22711386754387,66394541081452] |