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 | 22 |
| 5 | 44 |
| 6 | 212 |
| 7 | 262 |
| 8 | 282 |
| 9 | 434 |
| 10 | 474 |
| 11 | 646 |
| 12 | 666 |
| 13 | 818 |
| 14 | 838 |
| 15 | 868 |
| 16 | 2442 |
| 17 | 2662 |
| 18 | 2772 |
| 19 | 4884 |
| 20 | 4994 |
| 21 | 6666 |
| 22 | 6886 |
| 23 | 8118 |
| 24 | 8338 |
| 25 | 20202 |
| 26 | 20402 |
| 27 | 21012 |
| 28 | 21812 |
| 29 | 22322 |
| 30 | 22422 |
| 31 | 22922 |
| 32 | 23332 |
| 33 | 23532 |
| 34 | 24042 |
| 35 | 25652 |
| 36 | 26162 |
| 37 | 26262 |
| 38 | 26562 |
| 39 | 26762 |
| 40 | 27372 |
| 41 | 28682 |
| 42 | 40204 |
| 43 | 40804 |