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 | 0 |
| 2 | 7 |
| 3 | 148 |
| 4 | 3228 |
| 5 | 108454 |
| 6 | 4390670 |
| 7 | 208423682 |
| 8 | 11039126154 |