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 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 96 |
| 7 | 192 |
| 8 | 384 |
| 9 | 768 |
| 10 | 1506 |
| 11 | 2982 |
| 12 | 5904 |
| 13 | 11688 |
| 14 | 23094 |
| 15 | 45678 |
| 16 | 90000 |
| 17 | 177660 |
| 18 | 349938 |
| 19 | 690192 |
| 20 | 1359288 |
| 21 | 2678808 |
| 22 | 5271558 |
| 23 | 10381926 |
| 24 | 20419224 |
| 25 | 40191084 |
| 26 | 79025262 |
| 27 | 155469228 |
| 28 | 305582724 |
| 29 | 600935844 |
| 30 | 1180783482 |
| 31 | 2321203446 |
| 32 | 4559743116 |
| 33 | 8960747616 |