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 | 7 |
| 4 | 53 |
| 5 | 59 |
| 6 | 67 |
| 7 | 89 |
| 8 | 383 |
| 9 | 887 |
| 10 | 2027 |
| 11 | 3253 |
| 12 | 5669 |
| 13 | 7993 |
| 14 | 8009 |
| 15 | 9059 |
| 16 | 53633 |
| 17 | 54667 |
| 18 | 56533 |
| 19 | 88883 |
| 20 | 272777777 |
| 21 | 299222299 |
| 22 | 383833883 |
| 23 | 797769997 |