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 | 2 |
| 1 | 5 |
| 2 | 13 |
| 3 | 37 |
| 4 | 101 |
| 5 | 271 |
| 6 | 727 |
| 7 | 1931 |
| 8 | 5003 |
| 9 | 12547 |
| 10 | 30449 |
| 11 | 71761 |
| 12 | 165037 |
| 13 | 372149 |
| 14 | 826303 |
| 15 | 1813219 |
| 16 | 3944921 |
| 17 | 8533073 |
| 18 | 18393821 |
| 19 | 39588071 |
| 20 | 85192381 |
| 21 | 183479291 |
| 22 | 395667617 |
| 23 | 854417989 |
| 24 | 1847225579 |
| 25 | 3996807053 |
| 26 | 8650687127 |
| 27 | 18721431499 |
| 28 | 40496966207 |
| 29 | 87538925959 |
| 30 | 189076973699 |