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 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 14 |
| 6 | 36 |
| 7 | 80 |
| 8 | 206 |
| 9 | 494 |
| 10 | 1259 |
| 11 | 3144 |
| 12 | 8085 |
| 13 | 20676 |
| 14 | 53635 |
| 15 | 139144 |
| 16 | 363630 |
| 17 | 952148 |
| 18 | 2504626 |
| 19 | 6603367 |
| 20 | 17463287 |