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 | 2 |
| 2 | 7 |
| 3 | 43 |
| 4 | 224 |
| 5 | 1355 |
| 6 | 9306 |
| 7 | 66200 |
| 8 | 500249 |
| 9 | 3883527 |
| 10 | 31081813 |
| 11 | 254358928 |
| 12 | 2120975833 |