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 | 13 |
| 2 | 31 |
| 3 | 113 |
| 4 | 311 |
| 5 | 1031 |
| 6 | 1033 |
| 7 | 1103 |
| 8 | 1181 |
| 9 | 1301 |
| 10 | 1381 |
| 11 | 1811 |
| 12 | 1831 |
| 13 | 3011 |
| 14 | 3083 |
| 15 | 3301 |
| 16 | 3803 |
| 17 | 10333 |
| 18 | 11003 |
| 19 | 11083 |
| 20 | 11833 |
| 21 | 18013 |
| 22 | 18133 |
| 23 | 18803 |
| 24 | 30011 |
| 25 | 30881 |
| 26 | 31033 |
| 27 | 31081 |
| 28 | 31183 |
| 29 | 33013 |
| 30 | 33181 |
| 31 | 33301 |
| 32 | 33811 |
| 33 | 38011 |
| 34 | 38113 |