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) |
|---|---|
| 0 | 262143 |
| 1 | 133956095 |
| 2 | 4164689439 |
| 3 | 30480819815 |
| 4 | 108067596971 |
| 5 | 181775455573 |
| 6 | 829778399985 |
| 7 | 3308792362796 |
| 8 | 13477935949375 |
| 9 | 53091885766918 |
| 10 | 212211419623001 |
| 11 | 373835875492812 |
| 12 | 1694348683584839 |
| 13 | 6774129833031318 |