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 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 42 |
| 5 | 372 |
| 6 | 4231 |
| 7 | 48037 |
| 8 | 1171867 |
| 9 | 30957683 |
| 10 | 1262711362 |
| 11 | 67345167687 |
| 12 | 6258369400424 |