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 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 16 |
| 6 | 49 |
| 7 | 169 |
| 8 | 256 |
| 9 | 361 |
| 10 | 1444 |
| 11 | 3249 |
| 12 | 18496 |
| 13 | 64009 |
| 14 | 237169 |
| 15 | 364816 |
| 16 | 519841 |
| 17 | 2079364 |
| 18 | 4678569 |
| 19 | 26666896 |
| 20 | 92294449 |
| 21 | 341991049 |
| 22 | 526060096 |
| 23 | 749609641 |
| 24 | 2998438564 |
| 25 | 6746486769 |
| 26 | 38453641216 |
| 27 | 133088524969 |
| 28 | 493150849009 |
| 29 | 758578289296 |
| 30 | 1080936581761 |