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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 11 |
| 11 | 12 |
| 12 | 15 |
| 13 | 22 |
| 14 | 24 |
| 15 | 33 |
| 16 | 36 |
| 17 | 44 |
| 18 | 48 |
| 19 | 55 |
| 20 | 66 |
| 21 | 77 |
| 22 | 88 |
| 23 | 99 |
| 24 | 1111 |
| 25 | 1155 |
| 26 | 1248 |
| 27 | 2222 |
| 28 | 3333 |
| 29 | 4444 |
| 30 | 5555 |
| 31 | 6666 |
| 32 | 7777 |
| 33 | 8888 |
| 34 | 9999 |
| 35 | 27216 |
| 36 | 31248 |
| 37 | 111111 |
| 38 | 116688 |
| 39 | 121212 |
| 40 | 142128 |
| 41 | 212184 |
| 42 | 222222 |
| 43 | 242424 |
| 44 | 313131 |
| 45 | 321216 |
| 46 | 333333 |
| 47 | 363636 |
| 48 | 368424 |
| 49 | 444444 |