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 | 4 |
| 3 | 11 |
| 4 | 53 |
| 5 | 482 |
| 6 | 7918 |
| 7 | 226266 |
| 8 | 11076482 |
| 9 | 922911942 |
| 10 | 130457184642 |
| 11 | 31226202037017 |
| 12 | 12642538061714517 |
| 13 | 8652026056359367017 |
| 14 | 10004193381504526849017 |
| 15 | 19539080428042781631746217 |