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 | 8 |
| 2 | 36 |
| 3 | 194 |
| 4 | 1281 |
| 5 | 9701 |
| 6 | 78735 |
| 7 | 665135 |
| 8 | 5762860 |
| 9 | 50851224 |
| 10 | 455062596 |
| 11 | 4118082970 |
| 12 | 37607992089 |
| 13 | 346065767407 |
| 14 | 3204942420924 |
| 15 | 29844572385359 |
| 16 | 279238346816393 |
| 17 | 2623557174778439 |
| 18 | 24739954338671300 |
| 19 | 234057667428388199 |
| 20 | 2220819603016308080 |
| 21 | 21127269487386615272 |