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 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 28 |
| 7 | 52 |
| 8 | 99 |
| 9 | 193 |
| 10 | 377 |
| 11 | 739 |
| 12 | 1459 |
| 13 | 2908 |
| 14 | 5799 |
| 15 | 11537 |
| 16 | 23021 |
| 17 | 45971 |
| 18 | 91857 |
| 19 | 183513 |