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 | 10 |
| 3 | 315 |
| 4 | 3824 |
| 5 | 47269 |
| 6 | 560677 |
| 7 | 7079879 |
| 8 | 79433407 |
| 9 | 887292243 |
| 10 | 9778050835 |
| 11 | 110518283071 |
| 12 | 1198946387631 |