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 | 18 |
| 3 | 84 |
| 4 | 858 |
| 5 | 31122 |
| 6 | 3383898 |
| 7 | 188841114 |
| 8 | 68588585868 |
| 9 | 440400004044 |
| 10 | 7722272777722272 |