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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 14 |
| 6 | 24 |
| 7 | 122 |
| 8 | 318 |
| 9 | 2417851639229258349414245 |
| 10 | 14134776518227074636666380005943348126619871175004951664972849610340964762 |