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 | 4 |
| 2 | 9 |
| 3 | 16 |
| 4 | 49 |
| 5 | 64 |
| 6 | 81 |
| 7 | 289 |
| 8 | 324 |
| 9 | 576 |
| 10 | 841 |
| 11 | 2809 |
| 12 | 2916 |
| 13 | 3249 |
| 14 | 3481 |
| 15 | 5184 |
| 16 | 6241 |
| 17 | 7056 |
| 18 | 43681 |
| 19 | 67081 |
| 20 | 321489 |
| 21 | 651249 |
| 22 | 729316 |