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 | 29 |
| 3 | 229 |
| 4 | 409 |
| 5 | 449 |
| 6 | 499 |
| 7 | 929 |
| 8 | 2029 |
| 9 | 2099 |
| 10 | 2909 |
| 11 | 2999 |
| 12 | 4049 |
| 13 | 4099 |
| 14 | 4229 |
| 15 | 4409 |
| 16 | 4909 |
| 17 | 4999 |
| 18 | 9029 |
| 19 | 9049 |
| 20 | 9209 |
| 21 | 9929 |
| 22 | 9949 |
| 23 | 20029 |
| 24 | 20249 |
| 25 | 20929 |
| 26 | 22229 |
| 27 | 22409 |
| 28 | 24029 |
| 29 | 24049 |
| 30 | 24229 |
| 31 | 24499 |
| 32 | 29009 |
| 33 | 29209 |
| 34 | 29429 |
| 35 | 40009 |
| 36 | 40099 |
| 37 | 40429 |
| 38 | 40499 |
| 39 | 40949 |
| 40 | 42209 |
| 41 | 42299 |
| 42 | 42409 |