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 | 5 |
| 3 | 11 |
| 4 | 23 |
| 5 | 47 |
| 6 | 83 |
| 7 | 167 |
| 8 | 179 |
| 9 | 359 |
| 10 | 1679 |
| 11 | 719 |
| 12 | 1439 |
| 13 | 2879 |
| 14 | 3959 |
| 15 | 2159 |
| 16 | 2519 |
| 17 | 10799 |
| 18 | 5039 |
| 19 | 9239 |
| 20 | 12599 |
| 21 | 7559 |
| 22 | 20159 |
| 23 | 31679 |
| 24 | 27719 |
| 25 | 37799 |
| 26 | 45359 |
| 27 | 30239 |