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 | 4 |
| 2 | 14 |
| 3 | 104 |
| 4 | 2170 |
| 5 | 230540 |
| 6 | 499596550 |
| 7 | 309075799150640 |
| 8 | 14369391928071394429416818 |
| 9 | 146629927766168786368451678290041110762316052 |