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 | 3 |
| 3 | 16 |
| 4 | 129 |
| 5 | 1009 |
| 6 | 8997 |
| 7 | 80816 |
| 8 | 746483 |
| 9 | 6983847 |
| 10 | 66146105 |
| 11 | 632186200 |
| 12 | 6089173570 |