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 | 25 |
| 4 | 289 |
| 5 | 441 |
| 6 | 4225 |
| 7 | 5041 |
| 8 | 6889 |
| 9 | 66049 |
| 10 | 74529 |
| 11 | 78961 |
| 12 | 100489 |
| 13 | 1050625 |
| 14 | 1113025 |
| 15 | 16785409 |
| 16 | 17313921 |
| 17 | 17581249 |
| 18 | 19368801 |
| 19 | 26594649 |
| 20 | 26822041 |
| 21 | 27258841 |
| 22 | 268468225 |
| 23 | 272613121 |
| 24 | 284428225 |
| 25 | 297183121 |
| 26 | 4295098369 |