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 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 27 |
| 6 | 84 |
| 7 | 533 |
| 8 | 5474 |
| 9 | 53085 |
| 10 | 404277 |
| 11 | 4881327 |
| 12 | 64681840 |
| 13 | 821227056 |
| 14 | 9483498992 |
| 15 | 205857814704 |
| 16 | 4404636345376 |