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 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 9 |
| 6 | 13 |
| 7 | 19 |
| 8 | 28 |
| 9 | 42 |
| 10 | 63 |
| 11 | 94 |
| 12 | 141 |
| 13 | 212 |
| 14 | 318 |
| 15 | 477 |
| 16 | 716 |
| 17 | 1074 |
| 18 | 1611 |
| 19 | 2417 |
| 20 | 3626 |
| 21 | 5439 |
| 22 | 8158 |
| 23 | 12237 |