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 | 7 |
| 2 | 9 |
| 3 | 97 |
| 4 | 99 |
| 5 | 425 |
| 6 | 570 |
| 7 | 724 |
| 8 | 843 |
| 9 | 997 |
| 10 | 999 |
| 11 | 7807 |
| 12 | 9997 |
| 13 | 9999 |
| 14 | 36362 |
| 15 | 63633 |
| 16 | 99997 |
| 17 | 99999 |
| 18 | 326731 |
| 19 | 673264 |
| 20 | 999997 |
| 21 | 999999 |
| 22 | 4545451 |
| 23 | 5454544 |
| 24 | 9999997 |
| 25 | 9999999 |
| 26 | 47058820 |
| 27 | 52941175 |
| 28 | 99999997 |
| 29 | 99999999 |
| 30 | 331983804 |
| 31 | 332667331 |
| 32 | 384615383 |