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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 27 |
| 4 | 92 |
| 5 | 453 |
| 6 | 1616 |
| 7 | 8284 |
| 8 | 30254 |
| 9 | 159435 |
| 10 | 590374 |
| 11 | 3178992 |
| 12 | 11878204 |
| 13 | 65099245 |
| 14 | 244797592 |
| 15 | 1361584755 |
| 16 | 5144714416 |
| 17 | 28975155915 |
| 18 | 109899043030 |
| 19 | 625578384150 |
| 20 | 2380191727582 |
| 21 | 13672762887465 |
| 22 | 52161061683208 |
| 23 | 301987822527627 |
| 24 | 1154761251687762 |
| 25 | 6730778868555523 |