The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 203 |
| 2 | 529 |
| 3 | 1387 |
| 4 | 3649 |
| 5 | 9611 |
| 6 | 25265 |
| 7 | 66443 |
| 8 | 174817 |
| 9 | 460139 |
| 10 | 1211409 |
| 11 | 3189259 |
| 12 | 8396641 |
| 13 | 22107499 |
| 14 | 58209297 |
| 15 | 153270315 |
| 16 | 403580257 |
| 17 | 1062688075 |
| 18 | 2798238641 |
| 19 | 7368281835 |
| 20 | 19402138145 |
| 21 | 51089798827 |
| 22 | 134530145105 |
| 23 | 354246523595 |
[203,529,1387,3649,9611,25265,66443,174817,460139, 1211409,3189259,8396641,22107499,58209297, 153270315,403580257,1062688075,2798238641, 7368281835,19402138145,51089798827,134530145105, 354246523595] |