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 | 6 |
| 3 | 12 |
| 4 | 25 |
| 5 | 51 |
| 6 | 103 |
| 7 | 207 |
| 8 | 414 |
| 9 | 828 |
| 10 | 1656 |
| 11 | 3313 |
| 12 | 6627 |
| 13 | 13254 |
| 14 | 26509 |
| 15 | 53019 |
| 16 | 106039 |
| 17 | 212078 |
| 18 | 424157 |
| 19 | 848315 |
| 20 | 1696631 |
| 21 | 3393263 |
| 22 | 6786526 |
| 23 | 13573052 |
| 24 | 27146105 |
| 25 | 54292211 |
| 26 | 108584422 |
| 27 | 217168845 |
| 28 | 434337691 |
| 29 | 868675383 |
| 30 | 1737350766 |
| 31 | 3474701532 |
| 32 | 6949403065 |