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 | 97 |
| 5 | 212 |
| 6 | 997 |
| 7 | 3148 |
| 8 | 9997 |
| 9 | 20102 |
| 10 | 99997 |
| 11 | 999997 |
| 12 | 2001002 |
| 13 | 3074003 |
| 14 | 9999997 |
| 15 | 99999997 |
| 16 | 200010002 |
| 17 | 999999997 |
| 18 | 9999999997 |
| 19 | 20000100002 |
| 20 | 99999999997 |
| 21 | 953671853653 |
| 22 | 999999999997 |
| 23 | 2000001000002 |
| 24 | 2118984413357 |
| 25 | 2121179131852 |