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 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 5 |
| 6 | 17 |
| 7 | 45 |
| 8 | 184 |
| 9 | 748 |
| 10 | 4143 |
| 11 | 26532 |
| 12 | 221032 |
| 13 | 2326853 |
| 14 | 32202266 |
| 15 | 589436301 |
| 16 | 14459238676 |
| 17 | 477812658943 |