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 | 25 |
| 2 | 26 |
| 3 | 35 |
| 4 | 36 |
| 5 | 125 |
| 6 | 126 |
| 7 | 135 |
| 8 | 136 |
| 9 | 215 |
| 10 | 216 |
| 11 | 315 |
| 12 | 316 |
| 13 | 1125 |
| 14 | 1126 |
| 15 | 1135 |
| 16 | 1136 |
| 17 | 1215 |
| 18 | 1216 |
| 19 | 1315 |
| 20 | 1316 |