The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 289 |
| 4 | 1024 |
| 5 | 4096 |
| 6 | 14161 |
| 7 | 45796 |
| 8 | 150544 |
| 9 | 481636 |
| 10 | 1493284 |
| 11 | 4601025 |
| 12 | 14055001 |
| 13 | 42380100 |
| 14 | 126900225 |
| 15 | 378108025 |
| 16 | 1119906225 |
| 17 | 3301766521 |
| 18 | 9702250000 |
| 19 | 28419216400 |
| 20 | 83012558161 |
| 21 | 241951836996 |
| 22 | 703860593296 |
| 23 | 2044150748644 |
[9,81,289,1024,4096,14161,45796,150544,481636, 1493284,4601025,14055001,42380100,126900225, 378108025,1119906225,3301766521,9702250000, 28419216400,83012558161,241951836996,703860593296, 2044150748644] |