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 | 25 |
| 2 | 625 |
| 3 | 2209 |
| 4 | 9025 |
| 5 | 46225 |
| 6 | 261121 |
| 7 | 1600225 |
| 8 | 10220809 |
| 9 | 67158025 |
| 10 | 448380625 |
| 11 | 3024450025 |
| 12 | 20525433289 |
| 13 | 139828879969 |
| 14 | 954796716769 |
| 15 | 6529082812849 |
| 16 | 44686751584225 |
| 17 | 306015929742721 |
| 18 | 2096314482667729 |
| 19 | 14363485816713121 |