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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 21 |
| 3 | 532 |
| 4 | 24845 |
| 5 | 1856094 |
| 6 | 203076097 |
| 7 | 30633787976 |
| 8 | 6097546660185 |
| 9 | 1548899852221210 |
| 10 | 489114616743840461 |