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 | 4 |
| 3 | 8 |
| 4 | 15 |
| 5 | 26 |
| 6 | 48 |
| 7 | 89 |
| 8 | 165 |
| 9 | 305 |
| 10 | 561 |
| 11 | 1034 |
| 12 | 1908 |
| 13 | 3521 |
| 14 | 6496 |
| 15 | 11982 |
| 16 | 22101 |
| 17 | 40770 |
| 18 | 75210 |
| 19 | 138741 |
| 20 | 255934 |
| 21 | 472117 |
| 22 | 870911 |
| 23 | 1606567 |
| 24 | 2963628 |
| 25 | 5466988 |
| 26 | 10084919 |
| 27 | 18603592 |
| 28 | 34317946 |
| 29 | 63306130 |
| 30 | 116780470 |
| 31 | 215424285 |
| 32 | 397391986 |
| 33 | 733066807 |