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 | 3 |
| 2 | 11 |
| 3 | 13 |
| 4 | 31 |
| 5 | 101 |
| 6 | 103 |
| 7 | 113 |
| 8 | 131 |
| 9 | 311 |
| 10 | 313 |
| 11 | 331 |
| 12 | 1013 |
| 13 | 1031 |
| 14 | 1033 |
| 15 | 1103 |
| 16 | 1301 |
| 17 | 1303 |
| 18 | 3001 |
| 19 | 3011 |
| 20 | 3301 |
| 21 | 3313 |
| 22 | 3331 |
| 23 | 10103 |
| 24 | 10111 |
| 25 | 10133 |
| 26 | 10301 |
| 27 | 10303 |
| 28 | 10313 |
| 29 | 10331 |
| 30 | 10333 |
| 31 | 11003 |
| 32 | 11113 |
| 33 | 11131 |
| 34 | 11311 |
| 35 | 13001 |
| 36 | 13003 |
| 37 | 13033 |
| 38 | 13103 |
| 39 | 13313 |
| 40 | 13331 |
| 41 | 30011 |
| 42 | 30013 |
| 43 | 30103 |
| 44 | 30113 |
| 45 | 30133 |
| 46 | 30313 |
| 47 | 31013 |
| 48 | 31033 |
| 49 | 31333 |
| 50 | 33013 |