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 | 4 |
| 2 | 40 |
| 3 | 112 |
| 4 | 220 |
| 5 | 400 |
| 6 | 1012 |
| 7 | 1120 |
| 8 | 1300 |
| 9 | 2020 |
| 10 | 2200 |
| 11 | 3100 |
| 12 | 4000 |
| 13 | 10012 |
| 14 | 10120 |
| 15 | 10300 |
| 16 | 11020 |
| 17 | 11200 |
| 18 | 12100 |
| 19 | 13000 |
| 20 | 20020 |
| 21 | 20200 |
| 22 | 21100 |
| 23 | 22000 |
| 24 | 30100 |
| 25 | 31000 |
| 26 | 40000 |
| 27 | 100012 |
| 28 | 100120 |
| 29 | 100300 |
| 30 | 101020 |
| 31 | 101200 |
| 32 | 102100 |
| 33 | 103000 |
| 34 | 110020 |
| 35 | 110200 |
| 36 | 111100 |