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 | 22 |
| 2 | 122 |
| 3 | 202 |
| 4 | 212 |
| 5 | 220 |
| 6 | 221 |
| 7 | 223 |
| 8 | 224 |
| 9 | 225 |
| 10 | 226 |
| 11 | 227 |
| 12 | 228 |
| 13 | 229 |
| 14 | 232 |
| 15 | 242 |
| 16 | 252 |
| 17 | 262 |
| 18 | 272 |
| 19 | 282 |
| 20 | 292 |
| 21 | 322 |
| 22 | 422 |
| 23 | 522 |
| 24 | 622 |
| 25 | 722 |
| 26 | 822 |
| 27 | 922 |
| 28 | 1022 |
| 29 | 1122 |
| 30 | 1202 |
| 31 | 1212 |
| 32 | 1220 |
| 33 | 1221 |
| 34 | 1223 |
| 35 | 1224 |
| 36 | 1225 |
| 37 | 1226 |
| 38 | 1227 |
| 39 | 1228 |
| 40 | 1229 |
| 41 | 1232 |
| 42 | 1242 |
| 43 | 1252 |