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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 26 |
| 7 | 52 |
| 8 | 105 |
| 9 | 209 |
| 10 | 415 |
| 11 | 830 |
| 12 | 1661 |
| 13 | 3321 |
| 14 | 6641 |
| 15 | 13279 |
| 16 | 26565 |
| 17 | 53123 |
| 18 | 106237 |
| 19 | 212488 |
| 20 | 424973 |
| 21 | 849945 |
| 22 | 1699889 |
| 23 | 3399761 |
| 24 | 6799540 |
| 25 | 13599124 |
| 26 | 27198203 |
| 27 | 54396423 |
| 28 | 108792774 |
| 29 | 217585510 |
| 30 | 435171212 |
| 31 | 870342371 |
| 32 | 1740684723 |
| 33 | 3481369358 |
| 34 | 6962738693 |
| 35 | 13925477442 |