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 | 3 |
| 3 | 7 |
| 4 | 11 |
| 5 | 13 |
| 6 | 21 |
| 7 | 33 |
| 8 | 37 |
| 9 | 39 |
| 10 | 77 |
| 11 | 91 |
| 12 | 111 |
| 13 | 143 |
| 14 | 231 |
| 15 | 259 |
| 16 | 273 |
| 17 | 407 |
| 18 | 429 |
| 19 | 481 |
| 20 | 777 |
| 21 | 1001 |
| 22 | 1221 |
| 23 | 1443 |
| 24 | 2849 |
| 25 | 3003 |
| 26 | 3367 |
| 27 | 5291 |
| 28 | 8547 |
| 29 | 10101 |
| 30 | 15873 |
| 31 | 37037 |
| 32 | 111111 |