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 | 6 |
| 2 | 36 |
| 3 | 98 |
| 4 | 358 |
| 5 | 1152 |
| 6 | 3910 |
| 7 | 12994 |
| 8 | 43596 |
| 9 | 145678 |
| 10 | 487502 |
| 11 | 1630196 |
| 12 | 5453054 |
| 13 | 18238998 |
| 14 | 61008244 |
| 15 | 204063338 |
| 16 | 682563198 |
| 17 | 2283064944 |
| 18 | 7636504950 |
| 19 | 25542956650 |
| 20 | 85437392020 |
| 21 | 285775310062 |
| 22 | 955875582398 |
| 23 | 3197260259292 |
| 24 | 10694355621414 |