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 | 2 |
| 2 | 16 |
| 3 | 218 |
| 4 | 2962 |
| 5 | 36947 |
| 6 | 428187 |
| 7 | 4682514 |
| 8 | 49045356 |
| 9 | 497721760 |
| 10 | 4944054774 |