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 | 3 |
| 5 | 5 |
| 6 | 10 |
| 7 | 20 |
| 8 | 42 |
| 9 | 102 |
| 10 | 276 |
| 11 | 857 |
| 12 | 3233 |
| 13 | 15113 |
| 14 | 91717 |
| 15 | 751479 |