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 | 13 |
| 5 | 44 |
| 6 | 151 |
| 7 | 614 |
| 8 | 2446 |
| 9 | 11066 |
| 10 | 53368 |
| 11 | 253927 |
| 12 | 1316375 |
| 13 | 7213979 |
| 14 | 38175696 |
| 15 | 213766427 |