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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 12 |
| 8 | 23 |
| 9 | 45 |
| 10 | 90 |
| 11 | 180 |
| 12 | 359 |
| 13 | 717 |
| 14 | 1432 |
| 15 | 2862 |
| 16 | 5723 |
| 17 | 11444 |
| 18 | 22887 |
| 19 | 45772 |
| 20 | 91541 |
| 21 | 183078 |
| 22 | 366151 |
| 23 | 732295 |
| 24 | 1464583 |
| 25 | 2929158 |
| 26 | 5858307 |
| 27 | 11716603 |
| 28 | 23433196 |
| 29 | 46866379 |
| 30 | 93732744 |
| 31 | 187465471 |
| 32 | 374930922 |
| 33 | 749861819 |
| 34 | 1499723610 |