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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 7 |
| 7 | 12 |
| 8 | 23 |
| 9 | 46 |
| 10 | 91 |
| 11 | 180 |
| 12 | 359 |
| 13 | 717 |
| 14 | 1433 |
| 15 | 2864 |
| 16 | 5727 |
| 17 | 11453 |
| 18 | 22905 |
| 19 | 45809 |
| 20 | 91616 |
| 21 | 183232 |
| 22 | 366463 |
| 23 | 732924 |
| 24 | 1465847 |
| 25 | 2931694 |
| 26 | 5863386 |
| 27 | 11726772 |
| 28 | 23453543 |
| 29 | 46907084 |