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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 45 |
| 7 | 90 |
| 8 | 179 |
| 9 | 357 |
| 10 | 712 |
| 11 | 1422 |
| 12 | 2842 |
| 13 | 5681 |
| 14 | 11360 |
| 15 | 22716 |
| 16 | 45430 |
| 17 | 90856 |
| 18 | 181709 |
| 19 | 363413 |
| 20 | 726822 |
| 21 | 1453640 |
| 22 | 2907276 |
| 23 | 5814546 |
| 24 | 11629086 |
| 25 | 23258166 |
| 26 | 46516327 |
| 27 | 93032647 |