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 | 3 |
| 2 | 13 |
| 3 | 70 |
| 4 | 529 |
| 5 | 5148 |
| 6 | 68798 |
| 7 | 1220409 |
| 8 | 29377751 |
| 9 | 949700962 |
| 10 | 41536397680 |
| 11 | 2450653487731 |
| 12 | 195553849371916 |
| 13 | 21091722699002539 |
| 14 | 3077853629320011499 |
| 15 | 607688763160596614184 |
| 16 | 162407853243770174812161 |