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 | 2 |
| 2 | 7 |
| 3 | 44 |
| 4 | 529 |
| 5 | 12278 |
| 6 | 565723 |
| 7 | 51409856 |
| 8 | 9371059621 |
| 9 | 3387887032202 |
| 10 | 2463333456292207 |
| 11 | 3557380311703796564 |
| 12 | 10339081666350180289849 |
| 13 | 59703612489554311631068958 |