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 | 22 |
| 4 | 24 |
| 5 | 42 |
| 6 | 44 |
| 7 | 222 |
| 8 | 224 |
| 9 | 242 |
| 10 | 244 |
| 11 | 422 |
| 12 | 424 |
| 13 | 442 |
| 14 | 444 |
| 15 | 2222 |
| 16 | 2224 |
| 17 | 2242 |
| 18 | 2244 |
| 19 | 2422 |
| 20 | 2424 |
| 21 | 2442 |
| 22 | 2444 |
| 23 | 4222 |
| 24 | 4224 |
| 25 | 4242 |
| 26 | 4244 |
| 27 | 4422 |
| 28 | 4424 |
| 29 | 4442 |
| 30 | 4444 |
| 31 | 22222 |
| 32 | 22224 |
| 33 | 22242 |
| 34 | 22244 |
| 35 | 22422 |
| 36 | 22424 |
| 37 | 22442 |
| 38 | 22444 |
| 39 | 24222 |
| 40 | 24224 |
| 41 | 24242 |
| 42 | 24244 |
| 43 | 24422 |
| 44 | 24424 |