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 | 6 |
| 4 | 8 |
| 5 | 9 |
| 6 | 10 |
| 7 | 15 |
| 8 | 20 |
| 9 | 46 |
| 10 | 49 |
| 11 | 61 |
| 12 | 98 |
| 13 | 110 |
| 14 | 144 |
| 15 | 266 |
| 16 | 344 |
| 17 | 978 |
| 18 | 1692 |
| 19 | 1880 |
| 20 | 1924 |
| 21 | 3142 |
| 22 | 3220 |
| 23 | 4209 |
| 24 | 5708 |
| 25 | 7064 |
| 26 | 13465 |
| 27 | 13858 |
| 28 | 19474 |
| 29 | 22666 |
| 30 | 26807 |