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 | 12 |
| 3 | 36 |
| 4 | 48 |
| 5 | 90 |
| 6 | 180 |
| 7 | 294 |
| 8 | 576 |
| 9 | 1134 |
| 10 | 2160 |
| 11 | 4158 |
| 12 | 8496 |
| 13 | 16458 |
| 14 | 33096 |
| 15 | 65880 |
| 16 | 131712 |
| 17 | 262242 |
| 18 | 525852 |
| 19 | 1048686 |
| 20 | 2099520 |
| 21 | 4195296 |
| 22 | 8392824 |
| 23 | 16777350 |
| 24 | 33564672 |
| 25 | 67109250 |
| 26 | 134234256 |
| 27 | 268438860 |
| 28 | 536904480 |
| 29 | 1073741994 |
| 30 | 2147556240 |
| 31 | 4294967478 |
| 32 | 8590066944 |