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 | 4 |
| 2 | 22 |
| 3 | 166 |
| 4 | 1726 |
| 5 | 24814 |
| 6 | 494902 |
| 7 | 13729846 |
| 8 | 531077086 |
| 9 | 28697950174 |
| 10 | 2170176736102 |
| 11 | 230007989092006 |
| 12 | 34211282155446286 |
| 13 | 7149766552058591374 |
| 14 | 2101690590380890192342 |
| 15 | 869808621195903097079446 |
| 16 | 507261036269544624540347326 |