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 | 5 |
| 3 | 11 |
| 4 | 24 |
| 5 | 50 |
| 6 | 104 |
| 7 | 212 |
| 8 | 431 |
| 9 | 870 |
| 10 | 1752 |
| 11 | 3518 |
| 12 | 7057 |
| 13 | 14138 |
| 14 | 28310 |
| 15 | 56661 |
| 16 | 113377 |
| 17 | 226820 |
| 18 | 453728 |
| 19 | 907561 |
| 20 | 1815259 |
| 21 | 3630683 |
| 22 | 7261576 |
| 23 | 14523405 |
| 24 | 29047130 |
| 25 | 58094643 |
| 26 | 116189764 |
| 27 | 232380102 |
| 28 | 464760912 |
| 29 | 929522671 |
| 30 | 1859046381 |
| 31 | 3718094000 |
| 32 | 7436189507 |
| 33 | 14872380808 |