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 | 10 |
| 5 | 16 |
| 6 | 24 |
| 7 | 36 |
| 8 | 54 |
| 9 | 82 |
| 10 | 124 |
| 11 | 186 |
| 12 | 280 |
| 13 | 420 |
| 14 | 630 |
| 15 | 946 |
| 16 | 1420 |
| 17 | 2130 |
| 18 | 3196 |
| 19 | 4794 |
| 20 | 7192 |
| 21 | 10788 |
| 22 | 16182 |
| 23 | 24274 |
| 24 | 36412 |
| 25 | 54618 |
| 26 | 81928 |
| 27 | 122892 |
| 28 | 184338 |
| 29 | 276508 |
| 30 | 414762 |
| 31 | 622144 |
| 32 | 933216 |
| 33 | 1399824 |
| 34 | 2099736 |
| 35 | 3149604 |
| 36 | 4724406 |
| 37 | 7086610 |
| 38 | 10629916 |
| 39 | 15944874 |
| 40 | 23917312 |