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 | 2 |
| 5 | 4 |
| 6 | 7 |
| 7 | 12 |
| 8 | 19 |
| 9 | 41 |
| 10 | 71 |
| 11 | 141 |
| 12 | 255 |
| 13 | 509 |
| 14 | 924 |
| 15 | 1882 |
| 16 | 3395 |
| 17 | 6838 |
| 18 | 12715 |
| 19 | 25233 |
| 20 | 47049 |