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 | 9 |
| 5 | 51 |
| 6 | 473 |
| 7 | 3233 |
| 8 | 7657 |
| 9 | 7722 |
| 10 | 20002 |
| 11 | 124170 |
| 12 | 126137 |
| 13 | 977155 |