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 | 2 |
| 4 | 6 |
| 5 | 18 |
| 6 | 67 |
| 7 | 248 |
| 8 | 1005 |
| 9 | 4068 |
| 10 | 16955 |
| 11 | 71090 |
| 12 | 302194 |
| 13 | 1294752 |
| 14 | 5598368 |
| 15 | 24382450 |