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 | 8 |
| 1 | 15 |
| 2 | 29 |
| 3 | 57 |
| 4 | 113 |
| 5 | 225 |
| 6 | 449 |
| 7 | 897 |
| 8 | 1793 |
| 9 | 3585 |
| 10 | 7169 |
| 11 | 14337 |
| 12 | 28673 |
| 13 | 57345 |
| 14 | 114689 |
| 15 | 229377 |
| 16 | 458753 |
| 17 | 917505 |
| 18 | 1835009 |
| 19 | 3670017 |
| 20 | 7340033 |
| 21 | 14680065 |
| 22 | 29360129 |
| 23 | 58720257 |
| 24 | 117440513 |
| 25 | 234881025 |
| 26 | 469762049 |
| 27 | 939524097 |
| 28 | 1879048193 |
| 29 | 3758096385 |
| 30 | 7516192769 |
| 31 | 15032385537 |