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 | 9 |
| 3 | 61 |
| 4 | 550 |
| 5 | 6201 |
| 6 | 83894 |
| 7 | 1324177 |
| 8 | 23886552 |
| 9 | 484745029 |
| 10 | 10930266652 |
| 11 | 271107065043 |
| 12 | 7335664739264 |
| 13 | 215030576905171 |
| 14 | 6788059632853620 |
| 15 | 229590704738375917 |
| 16 | 8283076586956304128 |
| 17 | 317510426598228001881 |