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 | 12534 |
| 4 | 247163 |
| 5 | 4916282 |
| 6 | 97935886 |
| 7 | 1950327875 |
| 8 | 38835489653 |
| 9 | 773312516026 |
| 10 | 15398704815066 |
| 11 | 306628906800995 |
| 12 | 6105789048401634 |
| 13 | 121582346211823189 |
| 14 | 2421024919176322257 |
| 15 | 48208985952384503326 |