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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 9 |
| 5 | 18 |
| 6 | 36 |
| 7 | 73 |
| 8 | 147 |
| 9 | 295 |
| 10 | 591 |
| 11 | 1182 |
| 12 | 2364 |
| 13 | 4729 |
| 14 | 9459 |
| 15 | 18918 |
| 16 | 37837 |
| 17 | 75674 |
| 18 | 151348 |
| 19 | 302697 |
| 20 | 605395 |
| 21 | 1210791 |
| 22 | 2421582 |
| 23 | 4843165 |
| 24 | 9686330 |
| 25 | 19372660 |
| 26 | 38745320 |
| 27 | 77490641 |
| 28 | 154981282 |
| 29 | 309962565 |
| 30 | 619925131 |
| 31 | 1239850262 |
| 32 | 2479700524 |
| 33 | 4959401049 |
| 34 | 9918802098 |