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 | 222 |
| 2 | 1222 |
| 3 | 2022 |
| 4 | 2122 |
| 5 | 2202 |
| 6 | 2212 |
| 7 | 2220 |
| 8 | 2221 |
| 9 | 2223 |
| 10 | 2224 |
| 11 | 2225 |
| 12 | 2226 |
| 13 | 2227 |
| 14 | 2228 |
| 15 | 2229 |
| 16 | 2232 |
| 17 | 2242 |
| 18 | 2252 |
| 19 | 2262 |
| 20 | 2272 |
| 21 | 2282 |
| 22 | 2292 |
| 23 | 2322 |
| 24 | 2422 |
| 25 | 2522 |
| 26 | 2622 |
| 27 | 2722 |
| 28 | 2822 |
| 29 | 2922 |
| 30 | 3222 |
| 31 | 4222 |
| 32 | 5222 |
| 33 | 6222 |
| 34 | 7222 |
| 35 | 8222 |
| 36 | 9222 |
| 37 | 10222 |
| 38 | 11222 |
| 39 | 12022 |
| 40 | 12122 |
| 41 | 12202 |
| 42 | 12212 |