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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 18 |
| 6 | 36 |
| 7 | 69 |
| 8 | 134 |
| 9 | 263 |
| 10 | 526 |
| 11 | 1052 |
| 12 | 2085 |
| 13 | 4143 |
| 14 | 8250 |
| 15 | 16500 |
| 16 | 33000 |
| 17 | 65851 |
| 18 | 131484 |
| 19 | 262668 |
| 20 | 525336 |
| 21 | 1050672 |
| 22 | 2100045 |
| 23 | 4198157 |
| 24 | 8393603 |
| 25 | 16787206 |
| 26 | 33574412 |
| 27 | 67136750 |
| 28 | 134255332 |
| 29 | 268484858 |
| 30 | 536969716 |
| 31 | 1073939432 |
| 32 | 2147761687 |