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 | 37 |
| 4 | 71 |
| 5 | 681 |
| 6 | 1291 |
| 7 | 12237 |
| 8 | 23183 |
| 9 | 219601 |
| 10 | 416019 |
| 11 | 3940597 |
| 12 | 7465175 |