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 | 3 |
| 2 | 11 |
| 3 | 52 |
| 4 | 331 |
| 5 | 2949 |
| 6 | 38069 |
| 7 | 733817 |
| 8 | 21670554 |
| 9 | 1001901607 |
| 10 | 73852354365 |
| 11 | 8813580443406 |
| 12 | 1725174170633694 |