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 | 11 |
| 3 | 19 |
| 4 | 29 |
| 5 | 191 |
| 6 | 199 |
| 7 | 211 |
| 8 | 229 |
| 9 | 911 |
| 10 | 919 |
| 11 | 929 |
| 12 | 991 |
| 13 | 1129 |
| 14 | 1229 |
| 15 | 1291 |
| 16 | 1999 |
| 17 | 2111 |
| 18 | 2129 |
| 19 | 2221 |
| 20 | 2999 |
| 21 | 9199 |
| 22 | 9221 |
| 23 | 9929 |
| 24 | 11119 |
| 25 | 11299 |
| 26 | 12119 |
| 27 | 12211 |
| 28 | 12911 |
| 29 | 12919 |
| 30 | 19121 |
| 31 | 19211 |
| 32 | 19219 |
| 33 | 19919 |
| 34 | 19991 |
| 35 | 21121 |
| 36 | 21191 |
| 37 | 21211 |
| 38 | 21221 |
| 39 | 21911 |
| 40 | 21929 |
| 41 | 21991 |