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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 43 |
| 6 | 140 |
| 7 | 474 |
| 8 | 1648 |
| 9 | 5839 |
| 10 | 20980 |
| 11 | 76202 |
| 12 | 279168 |
| 13 | 1029962 |
| 14 | 3822336 |
| 15 | 14256228 |
| 16 | 53400912 |