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 | 131 |
| 6 | 151 |
| 7 | 313 |
| 8 | 383 |
| 9 | 787 |
| 10 | 797 |
| 11 | 929 |
| 12 | 74747 |
| 13 | 78787 |
| 14 | 95959 |
| 15 | 1212121 |
| 16 | 383838383 |
| 17 | 929292929 |
| 18 | 979797979 |
| 19 | 12121212121 |
| 20 | 151515151515151 |
| 21 | 383838383838383 |
| 22 | 38383838383838383 |
| 23 | 74747474747474747 |
| 24 | 95959595959595959 |
| 25 | 383838383838383838383 |
| 26 | 787878787878787878787 |