This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 225 |
| 4 | 625 |
| 5 | 3025 |
| 6 | 14641 |
| 7 | 53361 |
| 8 | 194481 |
| 9 | 815409 |
| 10 | 3418801 |
| 11 | 13359025 |
| 12 | 52200625 |
| 13 | 211266225 |
| 14 | 855036081 |
| 15 | 3400172721 |
| 16 | 13521270961 |
| 17 | 54243807409 |
| 18 | 217611987121 |
| 19 | 869173967025 |
| 20 | 3471607400625 |
| 21 | 13896604674225 |
| 22 | 55627148806321 |