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 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 46 |
| 6 | 89 |
| 7 | 176 |
| 8 | 350 |
| 9 | 697 |
| 10 | 1391 |
| 11 | 2780 |
| 12 | 5555 |
| 13 | 11098 |
| 14 | 22170 |
| 15 | 44288 |
| 16 | 88472 |
| 17 | 176729 |
| 18 | 353032 |
| 19 | 705224 |
| 20 | 1408771 |
| 21 | 2814203 |
| 22 | 5621746 |
| 23 | 11230193 |
| 24 | 22433834 |
| 25 | 44814616 |
| 26 | 89523251 |
| 27 | 178834811 |
| 28 | 357246713 |
| 29 | 713648606 |
| 30 | 1425609609 |
| 31 | 2847847987 |
| 32 | 5688961529 |