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 | 68 |
| 4 | 1541 |
| 5 | 37595 |
| 6 | 1947196 |
| 7 | 148906136 |
| 8 | 15063986288 |