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 | 3 |
| 2 | 5 |
| 3 | 11 |
| 4 | 23 |
| 5 | 47 |
| 6 | 109 |
| 7 | 229 |
| 8 | 457 |
| 9 | 1033 |
| 10 | 2161 |
| 11 | 4703 |
| 12 | 10079 |
| 13 | 20663 |
| 14 | 43223 |
| 15 | 94033 |
| 16 | 208849 |
| 17 | 420457 |
| 18 | 872687 |
| 19 | 1849921 |
| 20 | 3699841 |
| 21 | 8748001 |
| 22 | 17496001 |
| 23 | 36998411 |