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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 122 |
| 7 | 442 |
| 8 | 488 |
| 9 | 1768 |
| 10 | 17342 |
| 11 | 48742 |
| 12 | 49568 |
| 13 | 173188 |
| 14 | 1762742 |
| 15 | 4945342 |
| 16 | 4870988 |
| 17 | 17781568 |
| 18 | 173037542 |
| 19 | 491460742 |
| 20 | 494128388 |
| 21 | 1767642988 |
| 22 | 17784935342 |
| 23 | 48707897542 |
| 24 | 49159741568 |
| 25 | 173029590388 |
| 26 | 1766191840742 |
| 27 | 4940963833342 |