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 | 0 |
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 29 |
| 6 | 59 |
| 7 | 113 |
| 8 | 223 |
| 9 | 439 |
| 10 | 877 |
| 11 | 1721 |
| 12 | 3389 |
| 13 | 6653 |
| 14 | 13093 |
| 15 | 25741 |
| 16 | 50599 |
| 17 | 99487 |
| 18 | 195581 |
| 19 | 384509 |
| 20 | 755959 |