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 | 3 |
| 4 | 5 |
| 5 | 6 |
| 6 | 30 |
| 7 | 61 |
| 8 | 150 |
| 9 | 514 |
| 10 | 1025 |
| 11 | 5153 |
| 12 | 13390 |
| 13 | 13391 |
| 14 | 131964 |
| 15 | 502651 |
| 16 | 664312 |
| 17 | 4387185 |
| 18 | 5392318 |
| 19 | 20613826 |