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 | 49 |
| 2 | 1681 |
| 3 | 144400 |
| 4 | 225625 |
| 5 | 256036 |
| 6 | 324900 |
| 7 | 576081 |
| 8 | 24019801 |
| 9 | 1299602500 |
| 10 | 1587624025 |
| 11 | 2371690000 |
| 12 | 2496401296 |
| 13 | 2528178961 |
| 14 | 2924105625 |
| 15 | 3132976729 |
| 16 | 5198410000 |
| 17 | 5616902916 |
| 18 | 6350496100 |
| 19 | 8122515625 |
| 20 | 9985605184 |
| 21 | 249001998001 |