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) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 49 |
| 3 | 169 |
| 4 | 625 |
| 5 | 1369 |
| 6 | 3025 |
| 7 | 7921 |
| 8 | 18769 |
| 9 | 37249 |
| 10 | 208849 |
| 11 | 3485689 |
| 12 | 4950625 |
| 13 | 7756225 |
| 14 | 225150025 |
| 15 | 48195616225 |
| 16 | 264353307409 |
| 17 | 453673643809 |
| 18 | 1278932548201 |
| 19 | 5225490897028249 |
| 20 | 6290436331177441 |
| 21 | 16712972707067569 |