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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 10 |
| 6 | 12 |
| 7 | 18 |
| 8 | 20 |
| 9 | 28 |
| 10 | 36 |
| 11 | 48 |
| 12 | 84 |
| 13 | 132 |
| 14 | 393 |
| 15 | 657 |
| 16 | 744 |
| 17 | 1140 |
| 18 | 1580 |
| 19 | 2704 |
| 20 | 3244 |
| 21 | 8700 |
| 22 | 12250 |
| 23 | 17395 |
| 24 | 17860 |
| 25 | 19505 |
| 26 | 36785 |
| 27 | 59100 |
| 28 | 67805 |
| 29 | 97440 |