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 | 181 |
| 2 | 241 |
| 3 | 421 |
| 4 | 811 |
| 5 | 1181 |
| 6 | 1811 |
| 7 | 2141 |
| 8 | 2221 |
| 9 | 2411 |
| 10 | 4211 |
| 11 | 8111 |
| 12 | 21221 |
| 13 | 141121 |
| 14 | 142111 |
| 15 | 411211 |
| 16 | 1111181 |
| 17 | 1112141 |
| 18 | 1121221 |
| 19 | 1211141 |
| 20 | 1211411 |
| 21 | 1212121 |
| 22 | 2111411 |
| 23 | 2121121 |
| 24 | 2211211 |
| 25 | 2221111 |
| 26 | 2411111 |
| 27 | 4121111 |
| 28 | 4211111 |
| 29 | 11221211 |
| 30 | 12111221 |
| 31 | 12121121 |