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 | 2 |
| 1 | 3 |
| 2 | 6 |
| 3 | 13 |
| 4 | 26 |
| 5 | 52 |
| 6 | 104 |
| 7 | 207 |
| 8 | 414 |
| 9 | 828 |
| 10 | 1657 |
| 11 | 3314 |
| 12 | 6627 |
| 13 | 13255 |
| 14 | 26510 |
| 15 | 53020 |
| 16 | 106039 |
| 17 | 212079 |
| 18 | 424158 |
| 19 | 848316 |
| 20 | 1696632 |
| 21 | 3393263 |
| 22 | 6786526 |
| 23 | 13573053 |
| 24 | 27146106 |
| 25 | 54292211 |
| 26 | 108584423 |
| 27 | 217168846 |
| 28 | 434337692 |
| 29 | 868675383 |
| 30 | 1737350766 |
| 31 | 3474701533 |
| 32 | 6949403065 |