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 | 1 |
| 1 | 2 |
| 2 | 12 |
| 3 | 118 |
| 4 | 1605 |
| 5 | 27816 |
| 6 | 585046 |
| 7 | 14459138 |
| 8 | 410368743 |
| 9 | 13146830110 |
| 10 | 469123986529 |
| 11 | 18447791712945 |
| 12 | 792514583941223 |
| 13 | 36925394368325295 |
| 14 | 1854525584914459755 |
| 15 | 99872579714406393286 |
| 16 | 5740977285851988017769 |