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) |
|---|---|
| 1 | 5 |
| 2 | 11 |
| 3 | 25 |
| 4 | 50 |
| 5 | 108 |
| 6 | 217 |
| 7 | 450 |
| 8 | 915 |
| 9 | 1862 |
| 10 | 3757 |
| 11 | 7570 |
| 12 | 15258 |
| 13 | 30742 |
| 14 | 61859 |
| 15 | 124351 |
| 16 | 249935 |
| 17 | 502006 |
| 18 | 1007810 |
| 19 | 2022756 |
| 20 | 4058076 |
| 21 | 8139739 |
| 22 | 16322673 |
| 23 | 32724281 |
| 24 | 65595781 |
| 25 | 131463443 |
| 26 | 263434417 |
| 27 | 527812727 |
| 28 | 1057396420 |
| 29 | 2118099530 |
| 30 | 4242416336 |
| 31 | 8496524327 |
| 32 | 17015076867 |
| 33 | 34071744682 |
| 34 | 68222117694 |
| 35 | 136593130380 |