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 | 2 |
| 1 | 5 |
| 2 | 11 |
| 3 | 31 |
| 4 | 199 |
| 5 | 7780 |
| 6 | 7836134 |
| 7 | 2414689877132 |
| 8 | 56130437231102247784920 |
| 9 | 286386577668298411184599588898700746597286 |