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 | 11 |
| 8 | 22 |
| 9 | 42 |
| 10 | 84 |
| 11 | 165 |
| 12 | 330 |
| 13 | 654 |
| 14 | 1308 |
| 15 | 2605 |
| 16 | 5210 |
| 17 | 10398 |
| 18 | 20796 |
| 19 | 41550 |
| 20 | 83100 |
| 21 | 166116 |
| 22 | 332232 |
| 23 | 664299 |
| 24 | 1328598 |
| 25 | 2656866 |
| 26 | 5313732 |
| 27 | 10626810 |
| 28 | 21253620 |
| 29 | 42505932 |
| 30 | 85011864 |
| 31 | 170021123 |
| 32 | 340042246 |
| 33 | 680079282 |
| 34 | 1360158564 |