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 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 121 |
| 6 | 131 |
| 7 | 151 |
| 8 | 171 |
| 9 | 11211 |
| 10 | 11311 |
| 11 | 11511 |
| 12 | 11711 |
| 13 | 1112111 |
| 14 | 1113111 |
| 15 | 1115111 |
| 16 | 1117111 |
| 17 | 111121111 |
| 18 | 111131111 |
| 19 | 111151111 |
| 20 | 111171111 |
| 21 | 11111211111 |
| 22 | 11111311111 |
| 23 | 11111511111 |
| 24 | 11111711111 |
| 25 | 1111112111111 |
| 26 | 1111113111111 |