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 | 6 |
| 2 | 14 |
| 3 | 26 |
| 4 | 58 |
| 5 | 142 |
| 6 | 326 |
| 7 | 734 |
| 8 | 1713 |
| 9 | 3713 |
| 10 | 8057 |
| 11 | 17869 |
| 12 | 38985 |
| 13 | 84046 |
| 14 | 180010 |
| 15 | 385846 |
| 16 | 823687 |
| 17 | 1737474 |
| 18 | 3680099 |
| 19 | 7755978 |
| 20 | 16282918 |
| 21 | 34142786 |
| 22 | 71419857 |
| 23 | 148960009 |
| 24 | 310320958 |
| 25 | 645191390 |
| 26 | 1339363921 |
| 27 | 2777235410 |
| 28 | 5750237373 |
| 29 | 11891042257 |
| 30 | 24563702542 |
| 31 | 50684981730 |