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 | 2 |
| 2 | 13 |
| 3 | 19 |
| 4 | 40 |
| 5 | 85 |
| 6 | 173 |
| 7 | 322 |
| 8 | 635 |
| 9 | 1325 |
| 10 | 2806 |
| 11 | 5877 |
| 12 | 12293 |
| 13 | 25318 |
| 14 | 52348 |
| 15 | 110032 |
| 16 | 230666 |
| 17 | 481721 |
| 18 | 1008645 |
| 19 | 2105418 |
| 20 | 4397869 |
| 21 | 9221888 |
| 22 | 19306816 |
| 23 | 40379476 |
| 24 | 84574182 |
| 25 | 176999321 |
| 26 | 370432095 |
| 27 | 776067635 |
| 28 | 1625005774 |
| 29 | 3401774504 |
| 30 | 7125184125 |