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 | 2 |
| 1 | 2 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 5 |
| 7 | 10 |
| 8 | 13 |
| 9 | 13 |
| 10 | 26 |
| 11 | 32 |
| 12 | 287 |
| 13 | 18380 |
| 14 | 21727 |
| 15 | 23205 |
| 16 | 24828 |
| 17 | 35646 |
| 18 | 48819 |
| 19 | 51476 |