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 | 8 |
| 3 | 50 |
| 4 | 160 |
| 5 | 892 |
| 6 | 3794 |
| 7 | 19560 |
| 8 | 80112 |
| 9 | 371948 |
| 10 | 1614598 |
| 11 | 7180494 |
| 12 | 30794746 |
| 13 | 134269410 |
| 14 | 574754496 |
| 15 | 2471353090 |
| 16 | 10542096528 |
| 17 | 45057428356 |
| 18 | 191653403306 |
| 19 | 814082549052 |
| 20 | 3444043955350 |
| 21 | 14537736838038 |
| 22 | 61174002263338 |
| 23 | 256838845740468 |
| 24 | 1075631257186986 |