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 | 4 |
| 3 | 76 |
| 4 | 1120 |
| 5 | 13428 |
| 6 | 151342 |
| 7 | 1642285 |
| 8 | 17405478 |
| 9 | 181923798 |
| 10 | 1883330510 |
| 11 | 19364376037 |
| 12 | 198115964781 |
| 13 | 2019328569227 |