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 | 11 |
| 3 | 113 |
| 4 | 1732 |
| 5 | 35509 |
| 6 | 914213 |
| 7 | 28372686 |
| 8 | 1031486867 |
| 9 | 43009596241 |
| 10 | 2023804597256 |
| 11 | 106098215717113 |
| 12 | 6133027601141401 |
| 13 | 387563995785510010 |
| 14 | 26581805841852520619 |
| 15 | 1966679438751901515329 |
| 16 | 156133093759166939659212 |
| 17 | 13239463980230688450540781 |
| 18 | 1194277034550296812912993853 |