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 | 19 |
| 3 | 397841 |
| 4 | 1152331 |
| 5 | 3566699 |
| 6 | 24128658809 |
| 7 | 74683110361 |
| 8 | 216316727651 |
| 9 | 1339092172657 |
| 10 | 7967201553697 |