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 | 10 |
| 1 | 17 |
| 2 | 31 |
| 3 | 59 |
| 4 | 115 |
| 5 | 227 |
| 6 | 451 |
| 7 | 899 |
| 8 | 1795 |
| 9 | 3587 |
| 10 | 7171 |
| 11 | 14339 |
| 12 | 28675 |
| 13 | 57347 |
| 14 | 114691 |
| 15 | 229379 |
| 16 | 458755 |
| 17 | 917507 |
| 18 | 1835011 |
| 19 | 3670019 |
| 20 | 7340035 |
| 21 | 14680067 |
| 22 | 29360131 |
| 23 | 58720259 |
| 24 | 117440515 |
| 25 | 234881027 |
| 26 | 469762051 |
| 27 | 939524099 |
| 28 | 1879048195 |
| 29 | 3758096387 |