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 | 900 |
| 2 | 3364 |
| 3 | 12544 |
| 4 | 46656 |
| 5 | 173056 |
| 6 | 643204 |
| 7 | 2390116 |
| 8 | 8880400 |
| 9 | 32993536 |
| 10 | 122589184 |
| 11 | 455480964 |
| 12 | 1692335044 |
| 13 | 6287855616 |
| 14 | 23362511104 |
| 15 | 86803301376 |
| 16 | 322517224836 |
| 17 | 1198311166276 |
| 18 | 4452319442704 |
| 19 | 16542571369536 |
| 20 | 61463843852544 |